Author: hselasky
Date: Tue Jul 17 09:04:36 2018
New Revision: 336369
URL: https://svnweb.freebsd.org/changeset/base/336369
Log:
For multicast functions in ibcore, verify that LIDs are multicast LIDs.
The Infiniband spec defines "A multicast address is defined by a
MGID and a MLID" (section 10.5).
Add check to verify that the MLID value is in the correct address
range.
RoCE Annex (A16.9.10/11) declares that during attach (detach) QP to a
multicast group, if the QP is associated with a RoCE port, the
multicast group MLID is unused and is ignored.
During attach or detach multicast, when the QP is associated with a
port, it is enough to check the port's link layer and validate the
LID only if it is Infiniband. Otherwise, avoid validating the
multicast LID.
Linux commit:
8561eae60ff9417a50fa1fb2b83ae950dc5c1e21
5236333592244557a19694a51337df6ac018f0a7
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/ofed/drivers/infiniband/core/ib_verbs.c
Modified: head/sys/ofed/drivers/infiniband/core/ib_verbs.c
==============================================================================
--- head/sys/ofed/drivers/infiniband/core/ib_verbs.c Tue Jul 17 09:02:29
2018 (r336368)
+++ head/sys/ofed/drivers/infiniband/core/ib_verbs.c Tue Jul 17 09:04:36
2018 (r336369)
@@ -1467,13 +1467,52 @@ EXPORT_SYMBOL(ib_dealloc_fmr);
/* Multicast groups */
+static bool is_valid_mcast_lid(struct ib_qp *qp, u16 lid)
+{
+ struct ib_qp_init_attr init_attr = {};
+ struct ib_qp_attr attr = {};
+ int num_eth_ports = 0;
+ int port;
+
+ /* If QP state >= init, it is assigned to a port and we can check this
+ * port only.
+ */
+ if (!ib_query_qp(qp, &attr, IB_QP_STATE | IB_QP_PORT, &init_attr)) {
+ if (attr.qp_state >= IB_QPS_INIT) {
+ if (rdma_port_get_link_layer(qp->device, attr.port_num)
!=
+ IB_LINK_LAYER_INFINIBAND)
+ return true;
+ goto lid_check;
+ }
+ }
+
+ /* Can't get a quick answer, iterate over all ports */
+ for (port = 0; port < qp->device->phys_port_cnt; port++)
+ if (rdma_port_get_link_layer(qp->device, port) !=
+ IB_LINK_LAYER_INFINIBAND)
+ num_eth_ports++;
+
+ /* If we have at lease one Ethernet port, RoCE annex declares that
+ * multicast LID should be ignored. We can't tell at this step if the
+ * QP belongs to an IB or Ethernet port.
+ */
+ if (num_eth_ports)
+ return true;
+
+ /* If all the ports are IB, we can check according to IB spec. */
+lid_check:
+ return !(lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
+ lid == be16_to_cpu(IB_LID_PERMISSIVE));
+}
+
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
int ret;
if (!qp->device->attach_mcast)
return -ENOSYS;
- if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
+ if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
+ !is_valid_mcast_lid(qp, lid))
return -EINVAL;
ret = qp->device->attach_mcast(qp, gid, lid);
@@ -1489,7 +1528,8 @@ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gi
if (!qp->device->detach_mcast)
return -ENOSYS;
- if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
+ if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
+ !is_valid_mcast_lid(qp, lid))
return -EINVAL;
ret = qp->device->detach_mcast(qp, gid, lid);
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