Transformation Statistics
-------------------------
-xfrm_proc is a statistics shown factor dropped by transformation
-for developer.
-It is a counter designed from current transformation source code
-and defined like linux private MIB.
-Inbound statistics
-~~~~~~~~~~~~~~~~~~
+The xfrm_proc code is a set of statistics showing numbers of packets
+dropped by the transformation code and why. These counters are defined
+as part of the linux private MIB. These counters can be viewed in
+/proc/net/xfrm_stat.
+
+
+Inbound errors
+~~~~~~~~~~~~~~
XfrmInError:
All errors which is not matched others
XfrmInBufferError:
Policy discards
XfrmInPolError:
Policy error
+XfrmAcquireError:
+ State hasn't been fully acquired before use
+XfrmFwdHdrError:
+ Forward routing of a packet is not allowed
Outbound errors
~~~~~~~~~~~~~~~
Policy is dead
XfrmOutPolError:
Policy error
+XfrmOutStateInvalid:
+ State is invalid, perhaps expired