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dlm: add recovery callbacks

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These new callbacks notify the dlm user about lock recovery.
GFS2, and possibly others, need to be aware of when the dlm
will be doing lock recovery for a failed lockspace member.

In the past, this coordination has been done between dlm and
file system daemons in userspace, which then direct their
kernel counterparts.  These callbacks allow the same
coordination directly, and more simply.

Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
David Teigland
2011-11-02 14:30:58 -05:00
parent 757a427196
commit 60f98d1839
11 changed files with 336 additions and 175 deletions
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10
fs/dlm/recoverd.c
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@@ -2,7 +2,7 @@
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
** Copyright (C) 2004-2011 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
@@ -227,11 +227,12 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
dlm_grant_after_purge(ls);
log_debug(ls, "dlm_recover %llx done: %u ms",
(unsigned long long)rv->seq,
log_debug(ls, "dlm_recover %llx generation %u done: %u ms",
(unsigned long long)rv->seq, ls->ls_generation,
jiffies_to_msecs(jiffies - start));
mutex_unlock(&ls->ls_recoverd_active);
dlm_lsop_recover_done(ls);
return 0;
fail:
@@ -259,8 +260,7 @@ static void do_ls_recovery(struct dlm_ls *ls)
if (rv) {
ls_recover(ls, rv);
kfree(rv->nodeids);
kfree(rv->new);
kfree(rv->nodes);
kfree(rv);
}
}