[PATCH] opensm/osm_qos_policy.c: fix SL for TS-precreated mcast group

[Yevgeny Kliteynik <kliteyn-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>]

Assuming we still need to support TopSpin's non-compliant join
compmask for IPoIB v4 multicast group ff12:401b:<pkey>::1

The group is pre-defined and maintained as a well-known
multicast group, hence it's SL needs to be fixed too in
accordance with QoS policy configuration, same as for
ff12:401b:<pkey>::ffff:ffff MGID.

Signed-off-by: Yevgeny Kliteynik <kliteyn-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
---
 opensm/opensm/osm_qos_policy.c |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/opensm/opensm/osm_qos_policy.c b/opensm/opensm/osm_qos_policy.c
index ac49ab3..bdd27d0 100644
--- a/opensm/opensm/osm_qos_policy.c
+++ b/opensm/opensm/osm_qos_policy.c
@@ -764,6 +764,20 @@ static osm_qos_port_group_t *__qos_policy_get_port_group_by_name(

 /***************************************************
  ***************************************************/
+/*
+ * HACK: Until TS resolves their noncompliant join compmask,
+ * we have to fix SL for this pre-defined the MGID too
+ */
+static const ib_gid_t osm_ts_ipoib_mgid = {
+	{
+	 0xff,			/*  multicast field */
+	 0x12,			/*  non-permanent bit, link local scope */
+	 0x40, 0x1b,		/*  IPv4 signature */
+	 0xff, 0xff,		/*  16 bits of P_Key (to be filled in) */
+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/*  48 bits of zeros */
+	 0x00, 0x00, 0x00, 0x01,	/*  32 bit IPv4 broadcast address */
+	 },
+};

 static void __qos_policy_validate_pkey(
 			osm_qos_policy_t * p_qos_policy,
@@ -773,6 +787,9 @@ static void __qos_policy_validate_pkey(
 	uint8_t sl;
 	uint32_t flow;
 	uint8_t hop;
+	ib_gid_t mgid;
+	ib_net16_t pkey;
+	osm_mgrp_t * mgrp;
 	char gid_str[INET6_ADDRSTRLEN];

 	if (!p_qos_policy || !p_qos_match_rule || !p_prtn)
@@ -810,6 +827,24 @@ static void __qos_policy_validate_pkey(
 		p_prtn->mgrp->mcmember_rec.sl_flow_hop =
 			ib_member_set_sl_flow_hop(p_prtn->sl, flow, hop);
 	}
+
+	/* workaround for TS */
+	/* FIXME: remove this upon TS fixes */
+	mgid = osm_ts_ipoib_mgid;
+	pkey = p_prtn->pkey | cl_hton16(0x8000);
+	memcpy(&mgid.raw[4], &pkey, sizeof(pkey));
+	mgrp = osm_get_mgrp_by_mgid(p_qos_policy->p_subn, &mgid);
+	if (mgrp) {
+		OSM_LOG(&p_qos_policy->p_subn->p_osm->log, OSM_LOG_DEBUG,
+			"TS workaround: Updating MCGroup (MGID %s) SL to "
+			"match partition SL (%u)\n",
+			inet_ntop(AF_INET6, mgid.raw, gid_str, sizeof gid_str),
+			p_prtn->sl);
+		ib_member_get_sl_flow_hop(mgrp->mcmember_rec.sl_flow_hop,
+				  &sl, &flow, &hop);
+		mgrp->mcmember_rec.sl_flow_hop =
+			ib_member_set_sl_flow_hop(p_prtn->sl, flow, hop);
+	}
 }

 /***************************************************
-- 
1.6.2.4

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