Added support for DeviceInfo.MemoryStatus.MemoryMonitor. Object

src/deviceinfo.c

@@ -235,7 +235,7 @@ DMOBJ tDeviceInfoObj[] = {
 #endif
 
 #ifdef SYSMNGR_MEMORY_STATUS
-{"MemoryStatus", &DMREAD, NULL, NULL, NULL, NULL, NULL, NULL, NULL, tDeviceInfoMemoryStatusParams, NULL, BBFDM_BOTH},
+{"MemoryStatus", &DMREAD, NULL, NULL, NULL, NULL, NULL, NULL, tDeviceInfoMemoryStatusObj, tDeviceInfoMemoryStatusParams, NULL, BBFDM_BOTH},
 #endif
 
 #ifdef SYSMNGR_PROCESS_STATUS

src/memory.c

@@ -11,30 +11,491 @@
 
 #include "utils.h"
 
+#define DEFAULT_POLLING_INTERVAL "60"
+#define DEFAULT_CRITICAL_RISE_THRESHOLD "80"
+#define DEFAULT_CRITICAL_FALL_THRESHOLD "60"
+#define DEFAULT_CRITICAL_MEMORY_LOG_PATH "/var/log/critical_memory.log"
+
+typedef struct mem_info {
+    unsigned long mem_total;
+    unsigned long mem_free;
+    unsigned long buffers;
+    unsigned long cached;
+    unsigned long sreclaimable;
+} mem_info;
+
+typedef struct memory_ctx {
+	struct uloop_timeout memory_timer;
+	bool enable;
+	bool enable_critical_log;
+	unsigned int polling_interval;
+	unsigned int critical_rise_threshold;
+	unsigned int critical_fall_threshold;
+	time_t critical_rise_time;
+	time_t critical_fall_time;
+	char log_file[512];
+} memory_ctx;
+
+static memory_ctx g_memory_ctx = {0};
+
+/*************************************************************
+* COMMON FUNCTIONS
+**************************************************************/
+int sysmngr_meminfo(mem_info *info)
+{
+	FILE *f = NULL;
+	char *key = NULL, *val = NULL;
+	char line[256];
+
+	if ((f = fopen("/proc/meminfo", "r")) == NULL) {
+		BBF_ERR("Failed to open '/proc/meminfo' for reading memory info.");
+		return -1;
+	}
+
+	while (fgets(line, sizeof(line), f)) {
+		key = strtok(line, " :");
+		val = strtok(NULL, " ");
+
+		if (!key || !val)
+			continue;
+
+		if (!strcasecmp(key, "MemTotal"))
+			info->mem_total = atol(val);
+		else if (!strcasecmp(key, "MemFree"))
+			info->mem_free = atol(val);
+		else if (!strcasecmp(key, "Buffers"))
+			info->buffers = atol(val);
+		else if (!strcasecmp(key, "Cached"))
+			info->cached = atol(val);
+		else if (!strcasecmp(key, "SReclaimable"))
+			info->sreclaimable = atol(val);
+	}
+
+	fclose(f);
+	return 0;
+}
+
+static unsigned int calculate_memory_utilization(void)
+{
+	mem_info info = {0};
+
+	if (sysmngr_meminfo(&info) != 0) {
+		BBF_ERR("Failed to retrieve memory information for utilization calculation");
+		return 0;
+	}
+
+	unsigned long used_mem = info.mem_total - (info.mem_free + info.buffers + info.cached + info.sreclaimable);
+
+	return (unsigned int)((used_mem * 100) / info.mem_total);
+}
+
+static void send_memory_critical_state_event(unsigned int mem_utilization)
+{
+	struct blob_buf bb = {0};
+	char buf[32] = {0};
+
+	snprintf(buf, sizeof(buf), "%u", mem_utilization);
+
+	memset(&bb, 0, sizeof(struct blob_buf));
+	blob_buf_init(&bb, 0);
+
+	blobmsg_add_string(&bb, "name", "Device.DeviceInfo.MemoryStatus.MemoryMonitor.MemoryCriticalState!");
+
+	void *arr = blobmsg_open_array(&bb, "input");
+
+	void *table = blobmsg_open_table(&bb, NULL);
+	blobmsg_add_string(&bb, "path", "MemUtilization");
+	blobmsg_add_string(&bb, "data", buf);
+	blobmsg_add_string(&bb, "type", DMT_TYPE[DMT_UNINT]);
+	blobmsg_close_table(&bb, table);
+
+	blobmsg_close_array(&bb, arr);
+
+	if (sysmngr_ubus_invoke_sync("bbfdm", "notify_event", bb.head, NULL, NULL)) {
+		BBF_ERR("Failed to send 'MemoryCriticalState!' event");
+	} else {
+		BBF_DEBUG("'MemoryCriticalState!' event sent successfully with utilization at %u%%.", mem_utilization);
+	}
+
+	blob_buf_free(&bb);
+}
+
+void generate_log_file(time_t log_time, bool critical_state)
+{
+	FILE *log_file = fopen(g_memory_ctx.log_file, "w"); // Write mode, clears log each time
+	if (log_file == NULL) {
+		BBF_ERR("Failed to open log file at '%s'", g_memory_ctx.log_file);
+		return;
+	}
+
+	fprintf(log_file, "=== Memory Critical State %s at %s ===\n",
+		critical_state ? "Reached" : "no longer present", ctime(&log_time));
+
+	const char *commands[] = {
+		"top -b -n 1",  // Shows a snapshot of top output, including CPU and memory stats
+		"free", // Shows memory usage statistics in a human-readable format
+		NULL
+	};
+
+	for (int i = 0; commands[i] != NULL; i++) {
+		FILE *cmd_output = popen(commands[i], "r"); // flawfinder: ignore
+		if (cmd_output == NULL) {
+			fprintf(log_file, "Failed to execute command: %s\n", commands[i]);
+			BBF_ERR("Failed to execute system command: %s", commands[i]);
+			continue;
+		}
+
+		fprintf(log_file, "\nOutput of command: %s\n", commands[i]);
+		char buffer[256];
+		while (fgets(buffer, sizeof(buffer), cmd_output) != NULL) {
+			fprintf(log_file, "%s", buffer);
+		}
+
+		pclose(cmd_output);
+		fprintf(log_file, "\n");
+	}
+
+	fprintf(log_file, "=== End of Critical Memory Log ===\n\n");
+	fclose(log_file);
+
+	BBF_DEBUG("Generated memory log file at: '%s'", g_memory_ctx.log_file);
+}
+
+static void run_memory_monitor(void)
+{
+	unsigned int mem_utilization = calculate_memory_utilization();
+	char buf[32] = {0};
+
+	if ((mem_utilization > g_memory_ctx.critical_rise_threshold) &&
+		(g_memory_ctx.critical_fall_time >= g_memory_ctx.critical_rise_time)) {
+
+		BBF_INFO("Memory utilization reached critical threshold: %u%%", mem_utilization);
+
+		// Update CriticalRiseTimeStamp to the current time
+		g_memory_ctx.critical_rise_time = time(NULL);
+		snprintf(buf, sizeof(buf), "%ld", g_memory_ctx.critical_rise_time);
+		sysmngr_uci_set("sysmngr", "memory", "critical_rise_time", buf);
+
+		if (g_memory_ctx.enable_critical_log) {
+			// Generate log into the vendor log file referenced by 'VendorLogFileRef' parameter indicating critical condition is reached
+			generate_log_file(g_memory_ctx.critical_rise_time, true);
+		}
+
+		// Send 'MemoryCriticalState!' event
+		send_memory_critical_state_event(mem_utilization);
+	}
+
+	if ((mem_utilization < g_memory_ctx.critical_fall_threshold) &&
+		(g_memory_ctx.critical_rise_time > g_memory_ctx.critical_fall_time)) {
+
+		BBF_INFO("Memory utilization has fallen below critical threshold: %u%%", mem_utilization);
+
+		// Update CriticalFallTimeStamp to the current time
+		g_memory_ctx.critical_fall_time = time(NULL);
+		snprintf(buf, sizeof(buf), "%ld", g_memory_ctx.critical_fall_time);
+		sysmngr_uci_set("sysmngr", "memory", "critical_fall_time", buf);
+
+		if (g_memory_ctx.enable_critical_log) {
+			// Generate log into the vendor log file referenced by 'VendorLogFileRef' parameter indicating that the critical condition is no longer present
+			generate_log_file(g_memory_ctx.critical_fall_time, false);
+		}
+	}
+
+	BBF_INFO("Next memory monitor check scheduled in %d sec...", g_memory_ctx.polling_interval);
+	uloop_timeout_set(&g_memory_ctx.memory_timer, g_memory_ctx.polling_interval * 1000);
+}
+
+static void memory_timer_callback(struct uloop_timeout *timeout)
+{
+	run_memory_monitor();
+}
+
+static void fill_global_memory_ctx(void)
+{
+	char buf[16] = {0};
+
+	memset(&g_memory_ctx, 0, sizeof(struct memory_ctx));
+
+	g_memory_ctx.memory_timer.cb = memory_timer_callback;
+
+	sysmngr_uci_get("sysmngr", "memory", "enable", "0", buf, sizeof(buf));
+	g_memory_ctx.enable = ((int)strtol(buf, NULL, 10) != 0);
+	BBF_DEBUG("Memory Monitor Config: |Enable| |%d|", g_memory_ctx.enable);
+
+	sysmngr_uci_get("sysmngr", "memory", "enable_critical_log", "0", buf, sizeof(buf));
+	g_memory_ctx.enable_critical_log = ((int)strtol(buf, NULL, 10) != 0);
+	BBF_DEBUG("Memory Monitor Config: |EnableCriticalLog| |%d|", g_memory_ctx.enable_critical_log);
+
+	sysmngr_uci_get("sysmngr", "memory", "polling_interval", DEFAULT_POLLING_INTERVAL, buf, sizeof(buf));
+	g_memory_ctx.polling_interval = strtoul(buf, NULL, 10);
+	BBF_DEBUG("Memory Monitor Config: |PollingInterval| |%lu|", g_memory_ctx.polling_interval);
+
+	sysmngr_uci_get("sysmngr", "memory", "critical_rise_threshold", DEFAULT_CRITICAL_RISE_THRESHOLD, buf, sizeof(buf));
+	g_memory_ctx.critical_rise_threshold = strtoul(buf, NULL, 10);
+	BBF_DEBUG("Memory Monitor Config: |CriticalRiseThreshold| |%lu|", g_memory_ctx.critical_rise_threshold);
+
+	sysmngr_uci_get("sysmngr", "memory", "critical_fall_threshold", DEFAULT_CRITICAL_FALL_THRESHOLD, buf, sizeof(buf));
+	g_memory_ctx.critical_fall_threshold = strtoul(buf, NULL, 10);
+	BBF_DEBUG("Memory Monitor Config: |CriticalFallThreshold| |%lu|", g_memory_ctx.critical_fall_threshold);
+
+	sysmngr_uci_get("sysmngr", "memory", "critical_rise_time", "0", buf, sizeof(buf));
+	g_memory_ctx.critical_rise_time = strtol(buf, NULL, 10);
+	BBF_DEBUG("Memory Monitor Config: |CriticalRiseTimeStamp| |%lu|", g_memory_ctx.critical_rise_time);
+
+	sysmngr_uci_get("sysmngr", "memory", "critical_fall_time", "0", buf, sizeof(buf));
+	g_memory_ctx.critical_fall_time = strtol(buf, NULL, 10);
+	BBF_DEBUG("Memory Monitor Config: |CriticalFallTimeStamp| |%lu|", g_memory_ctx.critical_fall_time);
+
+	sysmngr_uci_get("sysmngr", "memory", "file_path", DEFAULT_CRITICAL_MEMORY_LOG_PATH, g_memory_ctx.log_file, sizeof(g_memory_ctx.log_file));
+	BBF_DEBUG("Memory Monitor Config: |FilePath| |%s|", g_memory_ctx.log_file);
+	if (!file_exists(g_memory_ctx.log_file)) {
+		// Create empty file if it doesn't exist
+		create_empty_file(g_memory_ctx.log_file);
+	}
+}
+
+/*************************************************************
+* EXTERNAL APIS
+**************************************************************/
+void sysmngr_memory_init(void)
+{
+	fill_global_memory_ctx();
+
+	if (!g_memory_ctx.enable) {
+		BBF_INFO("Memory monitoring is disabled.");
+		return;
+	}
+
+	BBF_INFO("Memory monitoring is enabled");
+	run_memory_monitor();
+}
+
+void sysmngr_memory_clean(void)
+{
+	uloop_timeout_cancel(&g_memory_ctx.memory_timer);
+	BBF_INFO("Memory monitoring process stopped");
+}
+
 /*************************************************************
 * GET & SET PARAM
 **************************************************************/
-static int get_memory_status_total(char* refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+static int get_DeviceInfoMemoryStatusMemoryMonitor_Enable(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
 {
-	json_object *res = NULL;
+	*value = dmuci_get_option_value_fallback_def("sysmngr", "memory", "enable", "0");
-	dmubus_call("system", "info", UBUS_ARGS{{}}, 0, &res);
-	DM_ASSERT(res, *value = dmstrdup("0"));
-	char *total = dmjson_get_value(res, 2, "memory", "total");
-	dmasprintf(value, "%lu", DM_STRTOUL(total) / 1024);
 	return 0;
 }
 
-static int get_memory_status_free(char* refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+static int set_DeviceInfoMemoryStatusMemoryMonitor_Enable(char *refparam, struct dmctx *ctx, void *data, char *instance, char *value, int action)
 {
-	json_object *res = NULL;
+	bool b;
-	dmubus_call("system", "info", UBUS_ARGS{{}}, 0, &res);
+
-	DM_ASSERT(res, *value = dmstrdup("0"));
+	switch (action)	{
-	char *free = dmjson_get_value(res, 2, "memory", "free");
+		case VALUECHECK:
-	dmasprintf(value, "%lu", DM_STRTOUL(free) / 1024);
+			if (bbfdm_validate_boolean(ctx, value))
+				return FAULT_9007;
+			break;
+		case VALUESET:
+			string_to_bool(value, &b);
+			dmuci_set_value("sysmngr", "memory", "enable", b ? "1" : "0");
+			break;
+	}
 	return 0;
 }
 
-static int get_memory_status_total_persistent(char* refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+static int get_DeviceInfoMemoryStatusMemoryMonitor_MemUtilization(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	dmasprintf(value, "%u", calculate_memory_utilization());
+	return 0;
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_PollingInterval(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	*value = dmuci_get_option_value_fallback_def("sysmngr", "memory", "polling_interval", DEFAULT_POLLING_INTERVAL);
+	return 0;
+}
+
+static int set_DeviceInfoMemoryStatusMemoryMonitor_PollingInterval(char *refparam, struct dmctx *ctx, void *data, char *instance, char *value, int action)
+{
+	switch (action)	{
+		case VALUECHECK:
+			if (bbfdm_validate_unsignedInt(ctx, value, RANGE_ARGS{{NULL,NULL}}, 1))
+				return FAULT_9007;
+			break;
+		case VALUESET:
+			dmuci_set_value("sysmngr", "memory", "polling_interval", value);
+			break;
+	}
+	return 0;
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_CriticalRiseThreshold(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	*value = dmuci_get_option_value_fallback_def("sysmngr", "memory", "critical_rise_threshold", DEFAULT_CRITICAL_RISE_THRESHOLD);
+	return 0;
+}
+
+static int set_DeviceInfoMemoryStatusMemoryMonitor_CriticalRiseThreshold(char *refparam, struct dmctx *ctx, void *data, char *instance, char *value, int action)
+{
+	switch (action)	{
+		case VALUECHECK:
+			if (bbfdm_validate_unsignedInt(ctx, value, RANGE_ARGS{{NULL,"100"}}, 1))
+				return FAULT_9007;
+			break;
+		case VALUESET:
+			dmuci_set_value("sysmngr", "memory", "critical_rise_threshold", value);
+			break;
+	}
+	return 0;
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_CriticalFallThreshold(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	*value = dmuci_get_option_value_fallback_def("sysmngr", "memory", "critical_fall_threshold", DEFAULT_CRITICAL_FALL_THRESHOLD);
+	return 0;
+}
+
+static int set_DeviceInfoMemoryStatusMemoryMonitor_CriticalFallThreshold(char *refparam, struct dmctx *ctx, void *data, char *instance, char *value, int action)
+{
+	switch (action)	{
+		case VALUECHECK:
+			if (bbfdm_validate_unsignedInt(ctx, value, RANGE_ARGS{{NULL,"100"}}, 1))
+				return FAULT_9007;
+			break;
+		case VALUESET:
+			dmuci_set_value("sysmngr", "memory", "critical_fall_threshold", value);
+			break;
+	}
+	return 0;
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_CriticalRiseTimeStamp(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	char *rise_time = NULL;
+
+	dmuci_get_option_value_string("sysmngr", "memory", "critical_rise_time", &rise_time);
+
+	return dm_time_utc_format(DM_STRTOL(rise_time), value);
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_CriticalFallTimeStamp(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	char *fall_time = NULL;
+
+	dmuci_get_option_value_string("sysmngr", "memory", "critical_fall_time", &fall_time);
+
+	return dm_time_utc_format(DM_STRTOL(fall_time), value);
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_EnableCriticalLog(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	*value = dmuci_get_option_value_fallback_def("sysmngr", "memory", "enable_critical_log", "0");
+	return 0;
+}
+
+static int set_DeviceInfoMemoryStatusMemoryMonitor_EnableCriticalLog(char *refparam, struct dmctx *ctx, void *data, char *instance, char *value, int action)
+{
+	bool b;
+
+	switch (action)	{
+		case VALUECHECK:
+			if (bbfdm_validate_boolean(ctx, value))
+				return FAULT_9007;
+			break;
+		case VALUESET:
+			string_to_bool(value, &b);
+			dmuci_set_value("sysmngr", "memory", "enable_critical_log", b ? "1" : "0");
+			break;
+	}
+	return 0;
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_VendorLogFileRef(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	char *file_path = dmuci_get_option_value_fallback_def("sysmngr", "memory", "file_path", DEFAULT_CRITICAL_MEMORY_LOG_PATH);
+
+	if (file_exists(file_path)) {
+		char file_uri[512] = {0};
+
+		// if there is a path, then prepend file:// to it to comply with bbf requirement of file URI
+		snprintf(file_uri, sizeof(file_uri), "file://%s", file_path);
+
+		// get the vendor file path
+		_bbfdm_get_references(ctx, "Device.DeviceInfo.VendorLogFile.", "Name", file_uri, value);
+	}
+	return 0;
+}
+
+static int get_DeviceInfoMemoryStatusMemoryMonitor_FilePath(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	*value = dmuci_get_option_value_fallback_def("sysmngr", "memory", "file_path", DEFAULT_CRITICAL_MEMORY_LOG_PATH);
+	return 0;
+}
+
+static int set_DeviceInfoMemoryStatusMemoryMonitor_FilePath(char *refparam, struct dmctx *ctx, void *data, char *instance, char *value, int action)
+{
+	char *file_path = dmuci_get_option_value_fallback_def("sysmngr", "memory", "file_path", DEFAULT_CRITICAL_MEMORY_LOG_PATH);
+
+	switch (action)	{
+		case VALUECHECK:
+			if (bbfdm_validate_string(ctx, value, -1, -1, NULL, NULL))
+				return FAULT_9007;
+
+			// Restriction: The path in `value` must either:
+			// - Start with "/var/log" for non-persistent logs, or
+			// - Start with "/log/" for persistent logs.
+			// Additionally, the path should not contain any '..' sequences
+			// to prevent directory traversal or invalid file paths.
+			if (!((strncmp(value, "/var/log", 8) == 0 || strncmp(value, "/log/", 5) == 0) && !strstr(value, ".."))) {
+				bbfdm_set_fault_message(ctx, "");
+				return FAULT_9007;
+			}
+
+			break;
+		case VALUESET:
+			if (file_exists(file_path)) {
+				struct uci_section *dmmap_sec = NULL;
+				char file_uri[512] = {0};
+
+				if (rename(file_path, value) != 0) {
+					bbfdm_set_fault_message(ctx, "Can't rename file from '%s' -> '%s'", file_path, value);
+					return FAULT_9007;
+				}
+
+				// Update VendorLogFile dmmap section
+				snprintf(file_uri, sizeof(file_uri), "file://%s", file_path);
+				dmmap_sec = get_dup_section_in_dmmap_opt("dmmap", "vendorlog", "log_file", file_uri);
+
+				snprintf(file_uri, sizeof(file_uri), "file://%s", value);
+				dmuci_set_value_by_section(dmmap_sec, "log_file", file_uri);
+			}
+
+			dmuci_set_value("sysmngr", "memory", "file_path", value);
+			break;
+	}
+	return 0;
+}
+
+static int get_memory_status_total(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	mem_info info = {0};
+
+	sysmngr_meminfo(&info);
+
+	dmasprintf(value, "%lu", info.mem_total);
+	return 0;
+}
+
+static int get_memory_status_free(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	mem_info info = {0};
+
+	sysmngr_meminfo(&info);
+
+	dmasprintf(value, "%lu", info.mem_free);
+	return 0;
+}
+
+static int get_memory_status_total_persistent(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
 {
 	struct statvfs dinfo;
 
@@ -48,7 +509,7 @@ static int get_memory_status_total_persistent(char* refparam, struct dmctx *ctx,
 	return 0;
 }
 
-static int get_memory_status_free_persistent(char* refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+static int get_memory_status_free_persistent(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
 {
 	struct statvfs dinfo;
 
@@ -62,10 +523,51 @@ static int get_memory_status_free_persistent(char* refparam, struct dmctx *ctx,
 	return 0;
 }
 
+/*************************************************************
+ * EVENTS
+ *************************************************************/
+static event_args MemoryCriticalState_event_args = {
+	.name = "", // This field is left empty because we are not listening to any external events, The system now operates within a single unified daemon,
+				// removing the need for separate event listeners. See send_memory_critical_state_event API for details on implementation.
+	.param = (const char *[]) {
+		"MemUtilization",
+		NULL
+	}
+};
+
+static int get_event_MemoryCriticalState(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
+{
+	*value = (char *)&MemoryCriticalState_event_args;
+	return 0;
+}
+
 /**********************************************************************************************************************************
 *                                            OBJ & LEAF DEFINITION
 ***********************************************************************************************************************************/
+/* *** Device.DeviceInfo.MemoryStatus.MemoryMonitor. *** */
+DMLEAF tDeviceInfoMemoryStatusMemoryMonitorParams[] = {
+/* PARAM, permission, type, getvalue, setvalue, bbfdm_type */
+{"Enable", &DMWRITE, DMT_BOOL, get_DeviceInfoMemoryStatusMemoryMonitor_Enable, set_DeviceInfoMemoryStatusMemoryMonitor_Enable, BBFDM_BOTH},
+{"MemUtilization", &DMREAD, DMT_UNINT, get_DeviceInfoMemoryStatusMemoryMonitor_MemUtilization, NULL, BBFDM_BOTH},
+{"PollingInterval", &DMWRITE, DMT_UNINT, get_DeviceInfoMemoryStatusMemoryMonitor_PollingInterval, set_DeviceInfoMemoryStatusMemoryMonitor_PollingInterval, BBFDM_BOTH},
+{"CriticalRiseThreshold", &DMWRITE, DMT_UNINT, get_DeviceInfoMemoryStatusMemoryMonitor_CriticalRiseThreshold, set_DeviceInfoMemoryStatusMemoryMonitor_CriticalRiseThreshold, BBFDM_BOTH},
+{"CriticalFallThreshold", &DMWRITE, DMT_UNINT, get_DeviceInfoMemoryStatusMemoryMonitor_CriticalFallThreshold, set_DeviceInfoMemoryStatusMemoryMonitor_CriticalFallThreshold, BBFDM_BOTH},
+{"CriticalRiseTimeStamp", &DMREAD, DMT_TIME, get_DeviceInfoMemoryStatusMemoryMonitor_CriticalRiseTimeStamp, NULL, BBFDM_BOTH},
+{"CriticalFallTimeStamp", &DMREAD, DMT_TIME, get_DeviceInfoMemoryStatusMemoryMonitor_CriticalFallTimeStamp, NULL, BBFDM_BOTH},
+{"EnableCriticalLog", &DMWRITE, DMT_BOOL, get_DeviceInfoMemoryStatusMemoryMonitor_EnableCriticalLog, set_DeviceInfoMemoryStatusMemoryMonitor_EnableCriticalLog, BBFDM_BOTH},
+{"VendorLogFileRef", &DMREAD, DMT_STRING, get_DeviceInfoMemoryStatusMemoryMonitor_VendorLogFileRef, NULL, BBFDM_BOTH},
+{"FilePath", &DMWRITE, DMT_STRING, get_DeviceInfoMemoryStatusMemoryMonitor_FilePath, set_DeviceInfoMemoryStatusMemoryMonitor_FilePath, BBFDM_BOTH},
+{"MemoryCriticalState!", &DMREAD, DMT_EVENT, get_event_MemoryCriticalState, NULL, BBFDM_USP},
+{0}
+};
+
 /* *** Device.DeviceInfo.MemoryStatus. *** */
+DMOBJ tDeviceInfoMemoryStatusObj[] = {
+/* OBJ, permission, addobj, delobj, checkdep, browseinstobj, nextdynamicobj, dynamicleaf, nextobj, leaf, linker, bbfdm_type */
+{"MemoryMonitor", &DMREAD, NULL, NULL, NULL, NULL, NULL, NULL, NULL, tDeviceInfoMemoryStatusMemoryMonitorParams, NULL, BBFDM_BOTH},
+{0}
+};
+
 DMLEAF tDeviceInfoMemoryStatusParams[] = {
 /* PARAM, permission, type, getvalue, setvalue, bbfdm_type, version*/
 {"Total", &DMREAD, DMT_UNINT, get_memory_status_total, NULL, BBFDM_BOTH},

src/memory.h

@@ -12,6 +12,10 @@
 #ifndef __MEMORY_H
 #define __MEMORY_H
 
+extern DMOBJ tDeviceInfoMemoryStatusObj[];
 extern DMLEAF tDeviceInfoMemoryStatusParams[];
 
+void sysmngr_memory_init(void);
+void sysmngr_memory_clean(void);
+
 #endif //__MEMORY_H

src/sysmngr.c

@@ -24,6 +24,10 @@
 #include "processes.h"
 #endif
 
+#ifdef SYSMNGR_MEMORY_STATUS
+#include "memory.h"
+#endif
+
 extern DM_MAP_OBJ tDynamicObj[];
 
 static void usage(char *prog)
@@ -36,9 +40,24 @@ static void usage(char *prog)
 	fprintf(stderr, "\n");
 }
 
+static void config_reload_cb(struct ubus_context *ctx, struct ubus_event_handler *ev,
+			  const char *type, struct blob_attr *msg)
+{
+	BBF_ERR("Reloading sysmngr upon 'sysmngr.reload' event");
+
+#ifdef SYSMNGR_MEMORY_STATUS
+	sysmngr_memory_clean();
+	sysmngr_memory_init();
+#endif
+
+}
+
 int main(int argc, char **argv)
 {
 	struct bbfdm_context bbfdm_ctx = {0};
+	struct ubus_event_handler ev = {
+		.cb = config_reload_cb,
+	};
 	int log_level = LOG_ERR;
 	int c = 0;
 
@@ -72,9 +91,16 @@ int main(int argc, char **argv)
 	sysmngr_process_init(&bbfdm_ctx.ubus_ctx);
 #endif
 
+#ifdef SYSMNGR_MEMORY_STATUS
+	sysmngr_memory_init();
+#endif
+
 	if (bbfdm_ubus_regiter_init(&bbfdm_ctx))
 		goto out;
 
+	if (ubus_register_event_handler(&bbfdm_ctx.ubus_ctx, &ev, "sysmngr.reload"))
+		goto out;
+
 	uloop_run();
 
 out:
@@ -84,6 +110,10 @@ out:
 	sysmngr_process_clean(&bbfdm_ctx.ubus_ctx);
 #endif
 
+#ifdef SYSMNGR_MEMORY_STATUS
+	sysmngr_memory_clean();
+#endif
+
 	closelog();
 
 	return 0;

src/utils.c

@@ -229,6 +229,30 @@ int sysmngr_uci_delete(struct uci_context *uci_ctx, const char *package, const c
 	return 0;
 }
 
+int sysmngr_ubus_invoke_sync(const char *obj, const char *method, struct blob_attr *msg, sysmngr_ubus_cb data_callback, void *callback_args)
+{
+	uint32_t id;
+	int rc = 0;
+
+	struct ubus_context *ubus_ctx = ubus_connect(NULL);
+	if (!ubus_ctx) {
+		BBF_ERR("Failed to connect with ubus, error: '%d'", errno);
+		return -1;
+	}
+
+	if (!ubus_lookup_id(ubus_ctx, obj, &id)) {
+		rc = ubus_invoke(ubus_ctx, id, method, msg, data_callback, callback_args, 5000);
+	} else {
+		BBF_ERR("Failed to lookup ubus object: '%s'", obj);
+		rc = -1;
+	}
+
+	ubus_free(ubus_ctx);
+
+	return rc;
+}
+
+
 int sysmngr_ubus_invoke_async(struct ubus_context *ubus_ctx, const char *obj, const char *method, struct blob_attr *msg,
 			    sysmngr_ubus_cb data_callback, sysmngr_ubus_async_cb complete_callback)
 {

src/utils.h

@@ -28,6 +28,7 @@ int sysmngr_uci_delete(struct uci_context *uci_ctx, const char *package, const c
 typedef void (*sysmngr_ubus_cb)(struct ubus_request *req, int type, struct blob_attr *msg);
 typedef void (*sysmngr_ubus_async_cb)(struct ubus_request *req, int ret);
 
+int sysmngr_ubus_invoke_sync(const char *obj, const char *method, struct blob_attr *msg, sysmngr_ubus_cb data_callback, void *callback_args);
 int sysmngr_ubus_invoke_async(struct ubus_context *ubus_ctx, const char *obj, const char *method, struct blob_attr *msg,
 			    sysmngr_ubus_cb data_callback, sysmngr_ubus_async_cb complete_callback);