IB/core: Add rdma_network_type to wc
Providers should tell IB core the wc's network type.
This is used in order to search for the proper GID in the
GID table. When using HCAs that can't provide this info,
IB core tries to deep examine the packet and extract
the GID type by itself.
We choose sgid_index and type from all the matching entries in
RDMA-CM based on hint from the IP stack and we set hop_limit for
the IP packet based on above hint from IP stack.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Somnath Kotur <Somnath.Kotur@Avagotech.Com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index ab05ef6..368fc22 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -51,6 +51,8 @@
#include <linux/socket.h>
#include <linux/irq_poll.h>
#include <uapi/linux/if_ether.h>
+#include <net/ipv6.h>
+#include <net/ip.h>
#include <linux/atomic.h>
#include <linux/mmu_notifier.h>
@@ -109,6 +111,35 @@
__attribute_const__ enum rdma_transport_type
rdma_node_get_transport(enum rdma_node_type node_type);
+enum rdma_network_type {
+ RDMA_NETWORK_IB,
+ RDMA_NETWORK_ROCE_V1 = RDMA_NETWORK_IB,
+ RDMA_NETWORK_IPV4,
+ RDMA_NETWORK_IPV6
+};
+
+static inline enum ib_gid_type ib_network_to_gid_type(enum rdma_network_type network_type)
+{
+ if (network_type == RDMA_NETWORK_IPV4 ||
+ network_type == RDMA_NETWORK_IPV6)
+ return IB_GID_TYPE_ROCE_UDP_ENCAP;
+
+ /* IB_GID_TYPE_IB same as RDMA_NETWORK_ROCE_V1 */
+ return IB_GID_TYPE_IB;
+}
+
+static inline enum rdma_network_type ib_gid_to_network_type(enum ib_gid_type gid_type,
+ union ib_gid *gid)
+{
+ if (gid_type == IB_GID_TYPE_IB)
+ return RDMA_NETWORK_IB;
+
+ if (ipv6_addr_v4mapped((struct in6_addr *)gid))
+ return RDMA_NETWORK_IPV4;
+ else
+ return RDMA_NETWORK_IPV6;
+}
+
enum rdma_link_layer {
IB_LINK_LAYER_UNSPECIFIED,
IB_LINK_LAYER_INFINIBAND,
@@ -537,6 +568,17 @@
union ib_gid dgid;
};
+union rdma_network_hdr {
+ struct ib_grh ibgrh;
+ struct {
+ /* The IB spec states that if it's IPv4, the header
+ * is located in the last 20 bytes of the header.
+ */
+ u8 reserved[20];
+ struct iphdr roce4grh;
+ };
+};
+
enum {
IB_MULTICAST_QPN = 0xffffff
};
@@ -773,6 +815,7 @@
IB_WC_IP_CSUM_OK = (1<<3),
IB_WC_WITH_SMAC = (1<<4),
IB_WC_WITH_VLAN = (1<<5),
+ IB_WC_WITH_NETWORK_HDR_TYPE = (1<<6),
};
struct ib_wc {
@@ -798,6 +841,7 @@
u8 port_num; /* valid only for DR SMPs on switches */
u8 smac[ETH_ALEN];
u16 vlan_id;
+ u8 network_hdr_type;
};
enum ib_cq_notify_flags {