sysfs: Export NVMe controller sysfs directory return function

The path is returned with the controller name by the nvme scan.
To return the path without the nvme scan nvme identify namespace.

Signed-off-by: Tokunori Ikegami <[email protected]>

src/libnvme.h

@@ -23,6 +23,7 @@ extern "C" {
 #include "nvme/tree.h"
 #include "nvme/util.h"
 #include "nvme/log.h"
+#include "nvme/sysfs.h"
 
 #ifdef __cplusplus
 }

src/libnvme.map

@@ -9,6 +9,7 @@ LIBNVME_1.9 {
 		nvme_submit_passthru;
 		nvme_submit_passthru64;
 		nvme_update_key;
+		nvme_ctrl_sysfs_dir;
 };
 
 LIBNVME_1_8 {

src/meson.build

@@ -132,6 +132,7 @@ install_headers([
         'nvme/types.h',
         'nvme/util.h',
         'nvme/mi.h',
+        'nvme/sysfs.h',
     ],
     subdir: 'nvme',
     install_mode: mode,

src/nvme/filters.c

@@ -11,6 +11,7 @@
 #include <dirent.h>
 
 #include "filters.h"
+#include "sysfs.h"
 #include "private.h"
 
 int nvme_namespace_filter(const struct dirent *d)

src/nvme/private.h

@@ -16,9 +16,7 @@
 #include "fabrics.h"
 #include "mi.h"
 
-
 const char *nvme_subsys_sysfs_dir(void);
-const char *nvme_ctrl_sysfs_dir(void);
 const char *nvme_ns_sysfs_dir(void);
 const char *nvme_slots_sysfs_dir(void);
 const char *nvme_uuid_ibm_filename(void);

src/nvme/sysfs.h

@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * This file is part of libnvme.
+ */
+
+#ifndef _LIBNVME_SYSFS_H
+#define _LIBNVME_SYSFS_H
+
+/**
+ * DOC: sysfs.h
+ *
+ * libnvme sysfs directory
+ */
+
+/**
+ * nvme_ctrl_sysfs_dir() - Return for a NVMe controller sysfs directory
+ *
+ * Return: NVMe controller sysfs directory
+ */
+const char *nvme_ctrl_sysfs_dir(void);
+
+#endif /* _LIBNVME_SYSFS_H */

src/nvme/tree.c

@@ -34,6 +34,7 @@
 #include "util.h"
 #include "fabrics.h"
 #include "log.h"
+#include "sysfs.h"
 #include "private.h"
 
 /**