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[PATCH] ocfs2: recheck recovery state after getting lock 

* after successfully taking the $RECOVERY lock in EX mode, recheck to make
  sure that recovery has not already begun or completed on another node

Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Kurt Hackel 2006-01-18 17:01:25 -08:00 committed by Mark Fasheh
parent 90f9dd8f72
commit 898efface1
1 changed files with 24 additions and 0 deletions
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24
fs/ocfs2/dlm/dlmrecovery.c
View File

@ -2032,6 +2032,30 @@ again:
dlm->reco.new_master);
status = -EEXIST;
} else {
status = 0;
/* see if recovery was already finished elsewhere */
spin_lock(&dlm->spinlock);
if (dlm->reco.dead_node == O2NM_INVALID_NODE_NUM) {
status = -EINVAL;
mlog(0, "%s: got reco EX lock, but "
"node got recovered already\n", dlm->name);
if (dlm->reco.new_master != O2NM_INVALID_NODE_NUM) {
mlog(ML_ERROR, "%s: new master is %u "
"but no dead node!\n",
dlm->name, dlm->reco.new_master);
BUG();
}
}
spin_unlock(&dlm->spinlock);
}
/* if this node has actually become the recovery master,
* set the master and send the messages to begin recovery */
if (!status) {
mlog(0, "%s: dead=%u, this=%u, sending "
"begin_reco now\n", dlm->name,
dlm->reco.dead_node, dlm->node_num);
status = dlm_send_begin_reco_message(dlm,
dlm->reco.dead_node);
/* this always succeeds */