path: root/include/rdma
diff options
authorSean Hefty <sean.hefty@intel.com>2009-11-19 13:26:06 -0800
committerRoland Dreier <rolandd@cisco.com>2009-11-19 13:26:06 -0800
commit6f8372b69c3198e06cecb1df2cb9682d0c55e657 (patch)
tree4cd9a39fd782bc973b0394f779572ca72737f55c /include/rdma
parentc4315d85f9b76834289fd503796c01b8311c4b84 (diff)
RDMA/cm: fix loopback address support
The RDMA CM is intended to support the use of a loopback address when establishing a connection; however, the behavior of the CM when loopback addresses are used is confusing and does not always work, depending on whether loopback was specified by the server, the client, or both. The defined behavior of rdma_bind_addr is to associate an RDMA device with an rdma_cm_id, as long as the user specified a non- zero address. (ie they weren't just trying to reserve a port) Currently, if the loopback address is passed to rdam_bind_addr, no device is associated with the rdma_cm_id. Fix this. If a loopback address is specified by the client as the destination address for a connection, it will fail to establish a connection. This is true even if the server is listing across all addresses or on the loopback address itself. The issue is that the server tries to translate the IP address carried in the REQ message to a local net_device address, which fails. The translation is not needed in this case, since the REQ carries the actual HW address that should be used. Finally, cleanup loopback support to be more transport neutral. Replace separate calls to get/set the sgid and dgid from the device address to a single call that behaves correctly depending on the format of the device address. And support both IPv4 and IPv6 address formats. Signed-off-by: Sean Hefty <sean.hefty@intel.com> [ Fixed RDS build by s/ib_addr_get/rdma_addr_get/ - Roland ] Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'include/rdma')
1 files changed, 10 insertions, 21 deletions
diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h
index 3a39c55d2b9..fa0d52b8e62 100644
--- a/include/rdma/ib_addr.h
+++ b/include/rdma/ib_addr.h
@@ -122,40 +122,29 @@ static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
-static inline void ib_addr_get_sgid(struct rdma_dev_addr *dev_addr,
- union ib_gid *gid)
+static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
- memcpy(gid, dev_addr->src_dev_addr + 4, sizeof *gid);
+ return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
-static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
- union ib_gid *gid)
+static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
- memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
+ memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
-static inline void ib_addr_get_dgid(struct rdma_dev_addr *dev_addr,
- union ib_gid *gid)
+static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
- memcpy(gid, dev_addr->dst_dev_addr + 4, sizeof *gid);
+ memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
-static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
- union ib_gid *gid)
+static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
- memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
+ memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
-static inline void iw_addr_get_sgid(struct rdma_dev_addr *dev_addr,
- union ib_gid *gid)
- memcpy(gid, dev_addr->src_dev_addr, sizeof *gid);
-static inline void iw_addr_get_dgid(struct rdma_dev_addr *dev_addr,
- union ib_gid *gid)
+static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
- memcpy(gid, dev_addr->dst_dev_addr, sizeof *gid);
+ memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
#endif /* IB_ADDR_H */