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dlm: improve how bast mode handling

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The lkb bastmode value is set in the context of processing the
lock, and read by the dlm_astd thread.  Because it's accessed
in these two separate contexts, the writing/reading ought to
be done under a lock.  This is simple to do by setting it and
reading it when the lkb is added to and removed from dlm_astd's
callback list which is properly locked.

Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
David Teigland
2008-12-09 11:55:46 -06:00
parent 0333969631
commit fd22a51bcc
5 changed files with 17 additions and 15 deletions
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4
fs/dlm/ast.h
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@@ -1,7 +1,7 @@
/******************************************************************************
*******************************************************************************
**
** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
@@ -13,7 +13,7 @@
#ifndef __ASTD_DOT_H__
#define __ASTD_DOT_H__
void dlm_add_ast(struct dlm_lkb *lkb, int type);
void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode);
void dlm_del_ast(struct dlm_lkb *lkb);
void dlm_astd_wake(void);