ocfs2_dlm: Add timeout to dlm join domain
Currently the ocfs2 dlm has no timeout during dlm join domain. While this is
not a problem in normal operation, this does become an issue if, say, the
other node is refusing to let the node join the domain because of a stuck
recovery. This patch adds a 90 sec timeout.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index e8ecf8c..6087c47 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -1264,6 +1264,8 @@
static int dlm_join_domain(struct dlm_ctxt *dlm)
{
int status;
+ unsigned int backoff;
+ unsigned int total_backoff = 0;
BUG_ON(!dlm);
@@ -1295,18 +1297,27 @@
}
do {
- unsigned int backoff;
status = dlm_try_to_join_domain(dlm);
/* If we're racing another node to the join, then we
* need to back off temporarily and let them
* complete. */
+#define DLM_JOIN_TIMEOUT_MSECS 90000
if (status == -EAGAIN) {
if (signal_pending(current)) {
status = -ERESTARTSYS;
goto bail;
}
+ if (total_backoff >
+ msecs_to_jiffies(DLM_JOIN_TIMEOUT_MSECS)) {
+ status = -ERESTARTSYS;
+ mlog(ML_NOTICE, "Timed out joining dlm domain "
+ "%s after %u msecs\n", dlm->name,
+ jiffies_to_msecs(total_backoff));
+ goto bail;
+ }
+
/*
* <chip> After you!
* <dale> No, after you!
@@ -1316,6 +1327,7 @@
*/
backoff = (unsigned int)(jiffies & 0x3);
backoff *= DLM_DOMAIN_BACKOFF_MS;
+ total_backoff += backoff;
mlog(0, "backoff %d\n", backoff);
msleep(backoff);
}
