if (lkb->lkb_exflags & DLM_LKF_CONVDEADLK) {
lkb->lkb_grmode = DLM_LOCK_NL;
lkb->lkb_sbflags |= DLM_SBF_DEMOTED;
- } else if (!(lkb->lkb_exflags & DLM_LKF_NODLCKWT)) {
- if (err)
- *err = -EDEADLK;
- else {
- log_print("can_be_granted deadlock %x now %d",
- lkb->lkb_id, now);
- dlm_dump_rsb(r);
- }
+ } else if (err) {
+ *err = -EDEADLK;
+ } else {
+ log_print("can_be_granted deadlock %x now %d",
+ lkb->lkb_id, now);
+ dlm_dump_rsb(r);
}
goto out;
}
return rv;
}
-/* FIXME: I don't think that can_be_granted() can/will demote or find deadlock
- for locks pending on the convert list. Once verified (watch for these
- log_prints), we should be able to just call _can_be_granted() and not
- bother with the demote/deadlk cases here (and there's no easy way to deal
- with a deadlk here, we'd have to generate something like grant_lock with
- the deadlk error.) */
-
/* Returns the highest requested mode of all blocked conversions; sets
cw if there's a blocked conversion to DLM_LOCK_CW. */
}
if (deadlk) {
- log_print("WARN: pending deadlock %x node %d %s",
- lkb->lkb_id, lkb->lkb_nodeid, r->res_name);
- dlm_dump_rsb(r);
+ /*
+ * If DLM_LKB_NODLKWT flag is set and conversion
+ * deadlock is detected, we request blocking AST and
+ * down (or cancel) conversion.
+ */
+ if (lkb->lkb_exflags & DLM_LKF_NODLCKWT) {
+ if (lkb->lkb_highbast < lkb->lkb_rqmode) {
+ queue_bast(r, lkb, lkb->lkb_rqmode);
+ lkb->lkb_highbast = lkb->lkb_rqmode;
+ }
+ } else {
+ log_print("WARN: pending deadlock %x node %d %s",
+ lkb->lkb_id, lkb->lkb_nodeid,
+ r->res_name);
+ dlm_dump_rsb(r);
+ }
continue;
}
deadlock, so we leave it on the granted queue and return EDEADLK in
the ast for the convert. */
- if (deadlk) {
+ if (deadlk && !(lkb->lkb_exflags & DLM_LKF_NODLCKWT)) {
/* it's left on the granted queue */
revert_lock(r, lkb);
queue_cast(r, lkb, -EDEADLK);