From 1a58d00221c816475973da4b9880046d77189b60 Mon Sep 17 00:00:00 2001
From: JDierkse <j.dierkse@madeo.nl>
Date: Thu, 4 Aug 2022 20:29:48 +0200
Subject: [PATCH] Support Synology iSCSI administration

---
 driver.go | 86 ++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 66 insertions(+), 20 deletions(-)

diff --git a/driver.go b/driver.go
index 1ff2b00..a4044eb 100644
--- a/driver.go
+++ b/driver.go
@@ -282,31 +282,77 @@ func (d *iscsiDriver) mountVolume(v *iscsiVolume) error {
 	// Wait for Physical Volume to appear
 	time.Sleep(500 * time.Millisecond)
 
-	// Get target device
-	cmd := "ls /dev/disk/by-path | grep \"" + v.TargetIQN + "\" | head -n 1"
-	out, errMsg := util.ExecuteCommandString(cmd)
+	out := ""
+	errMsg := ""
 
-	if len(out) > 0 {
-		logrus.Debug(out)
-	}
-	if len(errMsg) > 0 {
-		err := fmt.Errorf("Unable to find device: %s", errMsg)
-		return err
+	diskPathFolder := "/dev/disk/by-path"
+	fi, err := os.Lstat(diskPathFolder)
+	if os.IsNotExist(err) {
+		// Disk By Path doesn't exist
+
+		iscsiPathFolder := "/host/tmp/iscsi"
+		fi, err = os.Lstat(iscsiPathFolder)
+		if os.IsNotExist(err) {
+			// iSCSI Administration folder doesn't exist
+
+			return err
+		} else {
+			// iSCSI Administration folder exists, seen on Synology systems
+
+			// Get target device
+			cmd := "ls /host/tmp/iscsi | grep \"" + v.TargetIQN + "\" | head -n 1"
+			out, errMsg = util.ExecuteCommandString(cmd)
+
+			if len(out) > 0 {
+				logrus.Debug(out)
+			}
+			if len(errMsg) > 0 {
+				err := fmt.Errorf("Unable to find device: %s", errMsg)
+				return err
+			}
+
+			cmd = "readlink -nf /host/tmp/iscsi/" + out
+			out, errMsg = util.ExecuteCommandString(cmd)
+
+			if len(out) > 0 {
+				logrus.Debug(out)
+			}
+			if len(errMsg) > 0 {
+				err := fmt.Errorf("Unable to locate device: %s", errMsg)
+				return err
+			}
+		}
+	} else {
+		// Disk By Path exists
+
+		// Get target device
+		cmd := "ls /dev/disk/by-path | grep \"" + v.TargetIQN + "\" | head -n 1"
+		out, errMsg = util.ExecuteCommandString(cmd)
+
+		if len(out) > 0 {
+			logrus.Debug(out)
+		}
+		if len(errMsg) > 0 {
+			err := fmt.Errorf("Unable to find device: %s", errMsg)
+			return err
+		}
+
+		cmd = "readlink -nf /dev/disk/by-path/" + out
+		out, errMsg = util.ExecuteCommandString(cmd)
+
+		if len(out) > 0 {
+			logrus.Debug(out)
+		}
+		if len(errMsg) > 0 {
+			err := fmt.Errorf("Unable to locate device: %s", errMsg)
+			return err
+		}
 	}
 
-	cmd = "readlink -nf /dev/disk/by-path/" + out
-	out, errMsg = util.ExecuteCommandString(cmd)
-
-	if len(out) > 0 {
-		logrus.Debug(out)
-	}
-	if len(errMsg) > 0 {
-		err := fmt.Errorf("Unable to locate device: %s", errMsg)
-		return err
-	}
+	_ = fi
 
 	// Mount
-	cmd = "mount " + out + " " + v.Mountpoint
+	cmd := "mount " + out + " " + v.Mountpoint
 	out, errMsg = util.ExecuteCommandString(cmd)
 
 	if len(out) > 0 {