Add an API to allow retrieving an MCMemberRecord from the local cache
based on an MGID.
Signed-off-by: Sean Hefty <[EMAIL PROTECTED]>
---
This allows an existing MCMemberRecord to be used as a template for
creating other multicast groups.
--- svn3/gen2/trunk/src/linux-kernel/infiniband/include/rdma/ib_multicast.h
2006-05-25 11:18:47.000000000 -0700
+++ svn/gen2/trunk/src/linux-kernel/infiniband/include/rdma/ib_multicast.h
2006-05-23 14:58:06.000000000 -0700
@@ -82,4 +82,16 @@ struct ib_multicast *ib_join_multicast(s
*/
void ib_free_multicast(struct ib_multicast *multicast);
+/**
+ * ib_get_mcmember_rec - Looks up a multicast member record by its MGID and
+ * returns it if found.
+ * @device: Device associated with the multicast group.
+ * @port_num: Port on the specified device to associate with the multicast
+ * group.
+ * @mgid: MGID of multicast group.
+ * @rec: Location to copy SA multicast member record.
+ */
+int ib_get_mcmember_rec(struct ib_device *device, u8 port_num,
+ union ib_gid *mgid, struct ib_sa_mcmember_rec *rec);
+
#endif /* IB_MULTICAST_H */
--- svn3/gen2/trunk/src/linux-kernel/infiniband/core/multicast.c
2006-06-08 21:53:21.000000000 -0700
+++ svn/gen2/trunk/src/linux-kernel/infiniband/core/multicast.c 2006-06-08
17:14:01.000000000 -0700
@@ -612,6 +612,29 @@ void ib_free_multicast(struct ib_multica
}
EXPORT_SYMBOL(ib_free_multicast);
+int ib_get_mcmember_rec(struct ib_device *device, u8 port_num,
+ union ib_gid *mgid, struct ib_sa_mcmember_rec *rec)
+{
+ struct mcast_device *dev;
+ struct mcast_port *port;
+ struct mcast_group *group;
+ unsigned long flags;
+
+ dev = ib_get_client_data(device, &mcast_client);
+ if (!dev)
+ return -ENODEV;
+
+ port = &dev->port[port_num - dev->start_port];
+ spin_lock_irqsave(&port->lock, flags);
+ group = mcast_find(port, mgid);
+ if (group)
+ *rec = group->rec;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ return group ? 0 : -EADDRNOTAVAIL;
+}
+EXPORT_SYMBOL(ib_get_mcmember_rec);
+
static void mcast_groups_lost(struct mcast_port *port)
{
struct mcast_group *group;
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