return inode info for volume stats

Signed-off-by: Travis Glenn Hansen <travisghansen@yahoo.com>

README.md

@@ -206,9 +206,6 @@ work as soon as kubernetes support is available.
 # enable the container feature
 Enable-WindowsOptionalFeature -Online -FeatureName Containers –All
 
-# create symbolic link due to current limitations in the driver-registrar container
-New-Item -ItemType SymbolicLink -Path "C:\registration\" -Target "C:\var\lib\kubelet\plugins_registry\"
-
 # install a HostProcess compatible kubernetes
 ```
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "democratic-csi",
-  "version": "1.7.1",
+  "version": "1.7.2",
   "description": "kubernetes csi driver framework",
   "main": "bin/democratic-csi",
   "scripts": {
@@ -20,7 +20,7 @@
   "dependencies": {
     "@grpc/grpc-js": "^1.5.7",
     "@grpc/proto-loader": "^0.6.0",
-    "@kubernetes/client-node": "^0.16.3",
+    "@kubernetes/client-node": "^0.17.0",
     "async-mutex": "^0.3.1",
     "axios": "^0.27.2",
     "bunyan": "^1.8.15",

src/driver/index.js

@@ -3026,6 +3026,19 @@ class CsiBaseDriver {
                 unit: "BYTES",
               },
             ];
+            try {
+              result = await filesystem.getInodeInfo(device_path);
+              if (result) {
+                res.usage.push({
+                  available: result.inodes_free,
+                  total: result.inodes_total,
+                  used: result.inodes_used,
+                  unit: "INODES",
+                });
+              }
+            } catch (err) {
+              driver.ctx.logger.debug("failed to retrieve inode info", err);
+            }
             break;
           case "block":
             if (!(await filesystem.pathExists(device_path))) {

src/utils/filesystem.js

@@ -829,6 +829,32 @@ class Filesystem {
     return true;
   }
 
+  async getInodeInfo(path) {
+    const filesystem = this;
+    let args = ["-i"];
+    let result;
+
+    args.push(path);
+
+    try {
+      result = await filesystem.exec("df", args);
+      if (result.code == 0) {
+        result = result.stdout.split("\n")[1].replace(/\s\s+/g, " ");
+        let parts = result.split(" ");
+        return {
+          device: parts[0],
+          mount_path: parts[5],
+          inodes_total: parts[1],
+          inodes_used: parts[2],
+          inodes_used_percentage: parts[4].replace(/[^0-9.]/g, ""),
+          inodes_free: parts[3],
+        };
+      }
+    } catch (err) {
+      throw err;
+    }
+  }
+
   /**
    *
    * @param {*} path