On Wed, 2010-02-10 at 09:15 -0700, Yevgeny Kliteynik wrote:
> Hi Jim,
>
> [snip...]
>
> On 20/Nov/09 21:15, Jim Schutt wrote:
> > diff --git a/opensm/opensm/osm_qos.c b/opensm/opensm/osm_qos.c
> > index 08f9a60..f42c334 100644
> > --- a/opensm/opensm/osm_qos.c
> > +++ b/opensm/opensm/osm_qos.c
> > @@ -194,6 +194,7 @@ static ib_api_status_t sl2vl_update(osm_sm_t * sm,
> > osm_port_t * p_port,
> > {
> > ib_api_status_t status;
> > uint8_t i, num_ports;
> > + struct osm_routing_engine *re = sm->p_subn->p_osm->routing_engine_used;
> > osm_physp_t *p_physp;
> >
> > if (osm_node_get_type(osm_physp_get_node_ptr(p)) ==
> > IB_NODE_TYPE_SWITCH) {
> > @@ -213,8 +214,24 @@ static ib_api_status_t sl2vl_update(osm_sm_t * sm,
> > osm_port_t * p_port,
> > }
> >
> > for (i = 0; i< num_ports; i++) {
> > + ib_slvl_table_t routing_sl2vl;
> > + const ib_slvl_table_t *port_sl2vl;
> > + const ib_slvl_table_t *port_sl2vl_old;
> > +
> > + if (re->update_sl2vl) {
> >
>
> If routing failed, and no_fallback specified, OSM crashes here.
> The simple fix is, of course, just fixing the condition to
> "(re && re->update_sl2vl)", but
This could cause message deadlock for applications still running
on parts of fabric that are sill operational, if the last successful
routing was via a routing engine that wants to set SL2VL map values,
because we would overwrite them with inappropriate values.
But the following equivalent change would be OK:
diff --git a/opensm/opensm/osm_qos.c b/opensm/opensm/osm_qos.c
index 0f0b24f..07f4836 100644
--- a/opensm/opensm/osm_qos.c
+++ b/opensm/opensm/osm_qos.c
@@ -197,6 +197,12 @@ static ib_api_status_t sl2vl_update(osm_sm_t * sm,
osm_port_t * p_port,
struct osm_routing_engine *re = sm->p_subn->p_osm->routing_engine_used;
osm_physp_t *p_physp;
+ /*
+ * Do nothing unless the most recent routing attempt was successful.
+ */
+ if (!re)
+ return IB_SUCCESS;
+
if (osm_node_get_type(osm_physp_get_node_ptr(p)) ==
IB_NODE_TYPE_SWITCH) {
if (ib_port_info_get_vl_cap(&p->port_info) == 1) {
/* Check port 0's capability mask */
> I think that it would be better
> not to apply QoS configuration if unicast manager failed - just
> restart the sweep.
I think you are right. Something like this?
diff --git a/opensm/opensm/osm_state_mgr.c
b/opensm/opensm/osm_state_mgr.c
index 10d5e09..d8d4c9e 100644
--- a/opensm/opensm/osm_state_mgr.c
+++ b/opensm/opensm/osm_state_mgr.c
@@ -1113,7 +1113,11 @@ static void do_sweep(osm_sm_t * sm)
/* Re-program the switches fully */
sm->p_subn->ignore_existing_lfts = TRUE;
- osm_ucast_mgr_process(&sm->ucast_mgr);
+ if (osm_ucast_mgr_process(&sm->ucast_mgr)) {
+ OSM_LOG_MSG_BOX(sm->p_log, OSM_LOG_VERBOSE,
+ "REROUTE FAILED");
+ return;
+ }
osm_qos_setup(sm->p_subn->p_osm);
/* Reset flag */
@@ -1272,12 +1276,14 @@ repeat_discovery:
"LID ASSIGNMENT COMPLETE - STARTING SWITCH TABLE
CONFIG");
/*
- * Proceed with unicast forwarding table configuration.
+ * Proceed with unicast forwarding table configuration; repeat
+ * if unicast routing fails.
*/
if (!sm->ucast_mgr.cache_valid ||
osm_ucast_cache_process(&sm->ucast_mgr))
- osm_ucast_mgr_process(&sm->ucast_mgr);
+ if (osm_ucast_mgr_process(&sm->ucast_mgr))
+ goto repeat_discovery;
osm_qos_setup(sm->p_subn->p_osm);
diff --git a/opensm/opensm/osm_ucast_mgr.c
b/opensm/opensm/osm_ucast_mgr.c
index fbc9244..8ea2e52 100644
--- a/opensm/opensm/osm_ucast_mgr.c
+++ b/opensm/opensm/osm_ucast_mgr.c
@@ -955,6 +955,7 @@ int osm_ucast_mgr_process(IN osm_ucast_mgr_t *
p_mgr)
osm_opensm_t *p_osm;
struct osm_routing_engine *p_routing_eng;
cl_qmap_t *p_sw_guid_tbl;
+ int failed = 0;
OSM_LOG_ENTER(p_mgr->p_log);
@@ -973,7 +974,8 @@ int osm_ucast_mgr_process(IN osm_ucast_mgr_t *
p_mgr)
p_osm->routing_engine_used = NULL;
while (p_routing_eng) {
- if (!ucast_mgr_route(p_routing_eng, p_osm))
+ failed = ucast_mgr_route(p_routing_eng, p_osm);
+ if (!failed)
break;
p_routing_eng = p_routing_eng->next;
}
@@ -984,9 +986,11 @@ int osm_ucast_mgr_process(IN osm_ucast_mgr_t *
p_mgr)
struct osm_routing_engine *r = p_osm->default_routing_engine;
r->build_lid_matrices(r->context);
- r->ucast_build_fwd_tables(r->context);
- p_osm->routing_engine_used = r;
- osm_ucast_mgr_set_fwd_tables(p_mgr);
+ failed = r->ucast_build_fwd_tables(r->context);
+ if (!failed) {
+ p_osm->routing_engine_used = r;
+ osm_ucast_mgr_set_fwd_tables(p_mgr);
+ }
}
if (p_osm->routing_engine_used) {
@@ -1006,7 +1010,7 @@ int osm_ucast_mgr_process(IN osm_ucast_mgr_t *
p_mgr)
Exit:
CL_PLOCK_RELEASE(p_mgr->p_lock);
OSM_LOG_EXIT(p_mgr->p_log);
- return 0;
+ return failed;
}
static int ucast_build_lid_matrices(void *context)
Thanks -- Jim
>
> -- Yevgeny
>
>
>
> --
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