From c0339327bee545c368314d278e9e4cd5918c70aa Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood <nick@craig-wood.com>
Date: Sun, 20 Oct 2024 12:34:54 +0100
Subject: [PATCH] vfs: add ELOOP error

---
 cmd/cmount/fs.go | 2 ++
 cmd/mount/fs.go  | 2 ++
 cmd/mount2/fs.go | 2 ++
 vfs/errors.go    | 4 +++-
 4 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/cmd/cmount/fs.go b/cmd/cmount/fs.go
index c9dd2cb16..2424e360e 100644
--- a/cmd/cmount/fs.go
+++ b/cmd/cmount/fs.go
@@ -602,6 +602,8 @@ func translateError(err error) (errc int) {
 		return -fuse.ENOSYS
 	case vfs.EINVAL:
 		return -fuse.EINVAL
+	case vfs.ELOOP:
+		return -fuse.ELOOP
 	}
 	fs.Errorf(nil, "IO error: %v", err)
 	return -fuse.EIO
diff --git a/cmd/mount/fs.go b/cmd/mount/fs.go
index 66029bff0..9872a99e2 100644
--- a/cmd/mount/fs.go
+++ b/cmd/mount/fs.go
@@ -100,6 +100,8 @@ func translateError(err error) error {
 		return syscall.ENOSYS
 	case vfs.EINVAL:
 		return fuse.Errno(syscall.EINVAL)
+	case vfs.ELOOP:
+		return fuse.Errno(syscall.ELOOP)
 	}
 	fs.Errorf(nil, "IO error: %v", err)
 	return err
diff --git a/cmd/mount2/fs.go b/cmd/mount2/fs.go
index 4aa9afcd0..03f907ee8 100644
--- a/cmd/mount2/fs.go
+++ b/cmd/mount2/fs.go
@@ -128,6 +128,8 @@ func translateError(err error) syscall.Errno {
 		return syscall.ENOSYS
 	case vfs.EINVAL:
 		return syscall.EINVAL
+	case vfs.ELOOP:
+		return syscall.ELOOP
 	}
 	fs.Errorf(nil, "IO error: %v", err)
 	return syscall.EIO
diff --git a/vfs/errors.go b/vfs/errors.go
index f5775af10..c54b4dd91 100644
--- a/vfs/errors.go
+++ b/vfs/errors.go
@@ -10,7 +10,7 @@ import (
 // Error describes low level errors in a cross platform way.
 type Error byte
 
-// NB if changing errors translateError in cmd/mount/fs.go, cmd/cmount/fs.go
+// NB if changing errors, update translateError in cmd/mount/fs.go, cmd/cmount/fs.go, cmd/mount2/fs.go
 
 // Low level errors
 const (
@@ -20,6 +20,7 @@ const (
 	EBADF
 	EROFS
 	ENOSYS
+	ELOOP
 )
 
 // Errors which have exact counterparts in os
@@ -38,6 +39,7 @@ var errorNames = []string{
 	EBADF:     "Bad file descriptor",
 	EROFS:     "Read only file system",
 	ENOSYS:    "Function not implemented",
+	ELOOP:     "Too many symbolic links",
 }
 
 // Error renders the error as a string