diff --git a/libbbf_api/dmcommon.c b/libbbf_api/dmcommon.c
index 62d99f18..4d64fede 100644
--- a/libbbf_api/dmcommon.c
+++ b/libbbf_api/dmcommon.c
@@ -1963,6 +1963,23 @@ void strip_lead_trail_whitespace(char *str)
 	}
 }
 
+int dm_buf_to_file(char *buf, const char *filename)
+{
+	FILE *file;
+	int ret = -1;
+
+	if (buf == NULL || filename == NULL)
+		return ret;
+
+	file = fopen(filename, "w");
+	if (file) {
+		ret = fputs(buf, file);
+		fclose(file);
+	}
+
+	return ret;
+}
+
 int dm_file_to_buf(const char *filename, void *buf, size_t buf_size)
 {
 	FILE *file;
diff --git a/libbbf_api/dmcommon.h b/libbbf_api/dmcommon.h
index 69c1ec9b..3c098680 100644
--- a/libbbf_api/dmcommon.h
+++ b/libbbf_api/dmcommon.h
@@ -297,4 +297,5 @@ char *ioctl_get_ipv4(char *interface_name);
 char *get_ipv6(char *interface_name);
 bool validate_blob_message(struct blob_attr *src, struct blob_attr *dst);
 void strip_lead_trail_whitespace(char *str);
+int dm_buf_to_file(char *buf, const char *filename);
 #endif
diff --git a/libbbf_dm/dmdiagnostics.c b/libbbf_dm/dmdiagnostics.c
index d21fce05..d87e085f 100644
--- a/libbbf_dm/dmdiagnostics.c
+++ b/libbbf_dm/dmdiagnostics.c
@@ -179,23 +179,47 @@ static long upload_file(const char *file_path, const char *url, const char *user
 {
 	long res_code = 0;
 
-	CURL *curl = curl_easy_init();
-	if (curl) {
-		curl_easy_setopt(curl, CURLOPT_URL, url);
-		curl_easy_setopt(curl, CURLOPT_USERNAME, username);
-		curl_easy_setopt(curl, CURLOPT_PASSWORD, password);
-		curl_easy_setopt(curl, CURLOPT_TIMEOUT, CURL_TIMEOUT);
-		curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
-
-		FILE *fp = fopen(file_path, "rb");
-		if (fp) {
-			curl_easy_setopt(curl, CURLOPT_READDATA, fp);
-			curl_easy_perform(curl);
-			fclose(fp);
+	if (strncmp(url, FILE_URI, strlen(FILE_URI)) == 0) {
+		char dst_path[2046] = {0};
+		snprintf(dst_path, sizeof(dst_path), "%s", url+strlen(FILE_URI));
+		FILE *fp = fopen(file_path, "r");
+		if (fp == NULL) {
+			return -1;
 		}
 
-		curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &res_code);
-		curl_easy_cleanup(curl);
+		fseek(fp, 0, SEEK_END);
+		unsigned int length = ftell(fp);
+		fseek(fp, 0, SEEK_SET);
+		fclose(fp);
+
+		char buff[length];
+		memset(buff, 0, length);
+
+		if (dm_file_to_buf(file_path, buff, length) > 0) {
+			if (dm_buf_to_file(buff, dst_path) < 0)
+				res_code = -1;
+		} else {
+			res_code = -1;
+		}
+	} else {
+		CURL *curl = curl_easy_init();
+		if (curl) {
+			curl_easy_setopt(curl, CURLOPT_URL, url);
+			curl_easy_setopt(curl, CURLOPT_USERNAME, username);
+			curl_easy_setopt(curl, CURLOPT_PASSWORD, password);
+			curl_easy_setopt(curl, CURLOPT_TIMEOUT, CURL_TIMEOUT);
+			curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
+
+			FILE *fp = fopen(file_path, "rb");
+			if (fp) {
+				curl_easy_setopt(curl, CURLOPT_READDATA, fp);
+				curl_easy_perform(curl);
+				fclose(fp);
+			}
+
+			curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &res_code);
+			curl_easy_cleanup(curl);
+		}
 	}
 
 	return res_code;
diff --git a/libbbf_dm/dmtree/tr181/deviceinfo.c b/libbbf_dm/dmtree/tr181/deviceinfo.c
index b3c95b00..7e208584 100644
--- a/libbbf_dm/dmtree/tr181/deviceinfo.c
+++ b/libbbf_dm/dmtree/tr181/deviceinfo.c
@@ -20,6 +20,7 @@ LIST_HEAD(process_list);
 static int process_count = 0;
 
 #define PROCPS_BUFSIZE 1024
+#define DEF_VENDOR_LOG_FILE "/tmp/.vend_log"
 
 struct process_entry {
 	struct list_head list;
@@ -1214,8 +1215,18 @@ static int operate_DeviceInfoVendorLogFile_Upload(char *refparam, struct dmctx *
 
 	dmuci_get_value_by_section_string(((struct dmmap_dup *)data)->config_section, "log_file", &vlf_file_path);
 
+	if (DM_STRLEN(vlf_file_path) == 0) {
+		vlf_file_path = DEF_VENDOR_LOG_FILE;
+		char cmd[64] = {0};
+		snprintf(cmd, sizeof(cmd), "logread > %s", DEF_VENDOR_LOG_FILE);
+		system(cmd);
+	}
+
 	int res = bbf_upload_log(url, user, pass, vlf_file_path, upload_command, upload_path);
 
+	if (file_exists(DEF_VENDOR_LOG_FILE))
+		remove(DEF_VENDOR_LOG_FILE);
+
 	return res ? CMD_FAIL : CMD_SUCCESS;
 }