Commit f10da927 authored by Alexander Aring's avatar Alexander Aring Committed by David Teigland
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fs: dlm: add comment about lkb IFL flags 



This patch adds comments about the difference between the lower 2 bytes
of lkb flags and the 2 upper bytes of the lkb IFL flags. In short the
upper 2 bytes will be handled as internal flags whereas the lower 2
bytes are part of the DLM protocol and are used to exchange messages.

Signed-off-by: default avatarAlexander Aring <aahringo@redhat.com>
Signed-off-by: default avatarDavid Teigland <teigland@redhat.com>
parent 3182599f

fs/dlm/dlm_internal.h

+8 −0
Original line number Diff line number Diff line
@@ -207,6 +207,14 @@ struct dlm_args { 
#define DLM_IFL_TIMEOUT_CANCEL	0x00800000

#define DLM_IFL_DEADLOCK_CANCEL	0x01000000

#define DLM_IFL_STUB_MS		0x02000000 /* magic number for m_flags */

/* least significant 2 bytes are message changed, they are full transmitted

 * but at receive side only the 2 bytes LSB will be set.

 *

 * Even wireshark dlm dissector does only evaluate the lower bytes and note

 * that they may not be used on transceiver side, we assume the higher bytes

 * are for internal use or reserved so long they are not parsed on receiver

 * side.

 */

#define DLM_IFL_USER		0x00000001

#define DLM_IFL_ORPHAN		0x00000002