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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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8
fs/dlm/lock.c
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@@ -307,7 +307,7 @@ static void queue_cast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rv)
lkb->lkb_lksb->sb_status = rv;
lkb->lkb_lksb->sb_flags = lkb->lkb_sbflags;
dlm_add_ast(lkb, AST_COMP);
dlm_add_ast(lkb, AST_COMP, 0);
}
static inline void queue_cast_overlap(struct dlm_rsb *r, struct dlm_lkb *lkb)
@@ -320,10 +320,8 @@ static void queue_bast(struct dlm_rsb *r, struct dlm_lkb *lkb, int rqmode)
{
if (is_master_copy(lkb))
send_bast(r, lkb, rqmode);
else {
lkb->lkb_bastmode = rqmode;
dlm_add_ast(lkb, AST_BAST);
}
else
dlm_add_ast(lkb, AST_BAST, rqmode);
}
/*