recoverd.c (1ff8392c32a2645d2665ca779ecb91bb29361c13) recoverd.c (c36258b5925e6cf6bf72904635100593573bfcff)
1/******************************************************************************
2*******************************************************************************
3**
4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
5** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
6**
7** This copyrighted material is made available to anyone wishing to use,
8** modify, copy, or redistribute it subject to the terms and conditions

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19#include "recover.h"
20#include "lowcomms.h"
21#include "lock.h"
22#include "requestqueue.h"
23#include "recoverd.h"
24
25
26/* If the start for which we're re-enabling locking (seq) has been superseded
1/******************************************************************************
2*******************************************************************************
3**
4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
5** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
6**
7** This copyrighted material is made available to anyone wishing to use,
8** modify, copy, or redistribute it subject to the terms and conditions

--- 10 unchanged lines hidden (view full) ---

19#include "recover.h"
20#include "lowcomms.h"
21#include "lock.h"
22#include "requestqueue.h"
23#include "recoverd.h"
24
25
26/* If the start for which we're re-enabling locking (seq) has been superseded
27 by a newer stop (ls_recover_seq), we need to leave locking disabled. */
27 by a newer stop (ls_recover_seq), we need to leave locking disabled.
28
28
29 We suspend dlm_recv threads here to avoid the race where dlm_recv a) sees
30 locking stopped and b) adds a message to the requestqueue, but dlm_recoverd
31 enables locking and clears the requestqueue between a and b. */
32
29static int enable_locking(struct dlm_ls *ls, uint64_t seq)
30{
31 int error = -EINTR;
32
33static int enable_locking(struct dlm_ls *ls, uint64_t seq)
34{
35 int error = -EINTR;
36
37 down_write(&ls->ls_recv_active);
38
33 spin_lock(&ls->ls_recover_lock);
34 if (ls->ls_recover_seq == seq) {
35 set_bit(LSFL_RUNNING, &ls->ls_flags);
39 spin_lock(&ls->ls_recover_lock);
40 if (ls->ls_recover_seq == seq) {
41 set_bit(LSFL_RUNNING, &ls->ls_flags);
42 /* unblocks processes waiting to enter the dlm */
36 up_write(&ls->ls_in_recovery);
37 error = 0;
38 }
39 spin_unlock(&ls->ls_recover_lock);
43 up_write(&ls->ls_in_recovery);
44 error = 0;
45 }
46 spin_unlock(&ls->ls_recover_lock);
47
48 up_write(&ls->ls_recv_active);
40 return error;
41}
42
43static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
44{
45 unsigned long start;
46 int error, neg = 0;
47

--- 265 unchanged lines hidden --- 		49 return error;
50}
51
52static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
53{
54 unsigned long start;
55 int error, neg = 0;
56

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