_mountinfo: relax limits on major device numbers

Major numbers can go up to 511.

1 files changed, 2 insertions, 1 deletions

diff --git a/lbup/_mountinfo.py b/lbup/_mountinfo.py
index e687e96..d5b1548 100644
--- a/lbup/_mountinfo.py
+++ b/lbup/_mountinfo.py
@@ -58,7 +58,8 @@ class _MountEntry:
         self.parent_id = parent_id
 
         major, minor = map(int, devnum.split(b':'))
-        if major < 0 or major > 255 or minor < 0 or minor > 255:
+        # see Documentation/admin-guide/devices.txt in linux source
+        if major < 0 or major > 511 or minor < 0 or minor > 255:
             raise ValueError('Invalid device number', devnum)
         self.devnum = (major << 8) + minor