log: Introduce nvme_get_logging_level()

This is essentially a getter for nvme_init_logging() since
nvme_root_t is an opaque struct. Takes optional pointer
to bool args to retrieve PID and timestamp logging values.

Signed-off-by: Tomas Bzatek <[email protected]>

src/libnvme.map

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 LIBNVME_1.9 {
 	global:
+		nvme_get_logging_level;
 		nvme_submit_passthru;
 		nvme_submit_passthru64;
 };

src/nvme/log.c

@@ -99,6 +99,19 @@ void nvme_init_logging(nvme_root_t r, int lvl, bool log_pid, bool log_tstamp)
 	r->log_timestamp = log_tstamp;
 }
 
+int nvme_get_logging_level(nvme_root_t r, bool *log_pid, bool *log_tstamp)
+{
+	if (!r)
+		r = root;
+	if (!r)
+		return DEFAULT_LOGLEVEL;
+	if (log_pid)
+		*log_pid = r->log_pid;
+	if (log_tstamp)
+		*log_tstamp = r->log_timestamp;
+	return r->log_level;
+}
+
 void nvme_set_root(nvme_root_t r)
 {
 	root = r;

src/nvme/log.h

@@ -35,6 +35,20 @@
  */
 void nvme_init_logging(nvme_root_t r, int lvl, bool log_pid, bool log_tstamp);
 
+/**
+ * nvme_get_logging_level() - Get current logging level
+ * @r:		nvme_root_t context
+ * @log_pid:	Pointer to store a current value of logging of
+ *		the PID flag at (optional).
+ * @log_tstamp:	Pointer to store a current value of logging of
+ *		the timestamp flag at (optional).
+ *
+ * Retrieves current values of logging variables.
+ *
+ * Return: current log level value or DEFAULT_LOGLEVEL if not initialized.
+ */
+int nvme_get_logging_level(nvme_root_t r, bool *log_pid, bool *log_tstamp);
+
 /**
  * nvme_set_root() - Set nvme_root_t context
  * @r:		nvme_root_t context