Add SMB2 magic number

Closes #9671.

src/base/utils/fs.cpp

@@ -315,18 +315,22 @@ bool Utils::Fs::isNetworkFileSystem(const QString &path)
 
 #if defined(Q_OS_MAC) || defined(Q_OS_OPENBSD)
     // XXX: should we make sure HAVE_STRUCT_FSSTAT_F_FSTYPENAME is defined?
-    return ((strncmp(buf.f_fstypename, "nfs", sizeof(buf.f_fstypename)) == 0)
-        || (strncmp(buf.f_fstypename, "cifs", sizeof(buf.f_fstypename)) == 0)
+    return ((strncmp(buf.f_fstypename, "cifs", sizeof(buf.f_fstypename)) == 0)
+        || (strncmp(buf.f_fstypename, "nfs", sizeof(buf.f_fstypename)) == 0)
         || (strncmp(buf.f_fstypename, "smbfs", sizeof(buf.f_fstypename)) == 0));
 #else
-    // usually defined in /usr/include/linux/magic.h
-    const unsigned long CIFS_MAGIC_NUMBER = 0xFF534D42;
-    const unsigned long NFS_SUPER_MAGIC = 0x6969;
-    const unsigned long SMB_SUPER_MAGIC = 0x517B;
-
-    return ((buf.f_type == CIFS_MAGIC_NUMBER)
-        || (buf.f_type == NFS_SUPER_MAGIC)
-        || (buf.f_type == SMB_SUPER_MAGIC));
+    // Magic number references:
+    // 1. /usr/include/linux/magic.h
+    // 2. https://github.com/coreutils/coreutils/blob/master/src/stat.c
+    switch (buf.f_type) {
+    case 0xFF534D42:  // CIFS_MAGIC_NUMBER
+    case 0x6969:  // NFS_SUPER_MAGIC
+    case 0x517B:  // SMB_SUPER_MAGIC
+    case 0xFE534D42:  // S_MAGIC_SMB2
+        return true;
+    default:
+        return false;
+    }
 #endif
 }
 #endif