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Date: Wed, 29 May 2013 10:09:29 -0700
From: sean.hefty@...el.com
To: roland@...estorage.com, linux-rdma@...r.kernel.org,
netdev@...r.kernel.org
Cc: Sean Hefty <sean.hefty@...el.com>
Subject: [PATCH v5 23/28] rdma/ucm: Add ability to query GID addresses
From: Sean Hefty <sean.hefty@...el.com>
Part of address resolution is mapping IP addresses to IB GIDs.
With the changes to support querying larger addresses and more
path records, also provide a way to query IB GIDs after
resolution completes.
Signed-off-by: Sean Hefty <sean.hefty@...el.com>
---
drivers/infiniband/core/ucma.c | 50 ++++++++++++++++++++++++++++++++++++++
include/uapi/rdma/rdma_user_cm.h | 3 +-
2 files changed, 52 insertions(+), 1 deletions(-)
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 722f2ff..45bb052 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -48,6 +48,7 @@
#include <rdma/rdma_cm.h>
#include <rdma/rdma_cm_ib.h>
#include <rdma/ib_addr.h>
+#include <rdma/ib.h>
MODULE_AUTHOR("Sean Hefty");
MODULE_DESCRIPTION("RDMA Userspace Connection Manager Access");
@@ -782,6 +783,52 @@ static ssize_t ucma_query_path(struct ucma_context *ctx,
return ret;
}
+static ssize_t ucma_query_gid(struct ucma_context *ctx,
+ void __user *response, int out_len)
+{
+ struct rdma_ucm_query_addr_resp resp;
+ struct sockaddr_ib *addr;
+ int ret = 0;
+
+ if (out_len < sizeof(resp))
+ return -ENOSPC;
+
+ memset(&resp, 0, sizeof resp);
+
+ ucma_query_device_addr(ctx->cm_id, &resp);
+
+ addr = (struct sockaddr_ib *) &resp.src_addr;
+ resp.src_size = sizeof(*addr);
+ if (ctx->cm_id->route.addr.src_addr.ss_family == AF_IB) {
+ memcpy(addr, &ctx->cm_id->route.addr.src_addr, resp.src_size);
+ } else {
+ addr->sib_family = AF_IB;
+ addr->sib_pkey = (__force __be16) resp.pkey;
+ rdma_addr_get_sgid(&ctx->cm_id->route.addr.dev_addr,
+ (union ib_gid *) &addr->sib_addr);
+ addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *)
+ &ctx->cm_id->route.addr.src_addr);
+ }
+
+ addr = (struct sockaddr_ib *) &resp.dst_addr;
+ resp.dst_size = sizeof(*addr);
+ if (ctx->cm_id->route.addr.dst_addr.ss_family == AF_IB) {
+ memcpy(addr, &ctx->cm_id->route.addr.dst_addr, resp.dst_size);
+ } else {
+ addr->sib_family = AF_IB;
+ addr->sib_pkey = (__force __be16) resp.pkey;
+ rdma_addr_get_dgid(&ctx->cm_id->route.addr.dev_addr,
+ (union ib_gid *) &addr->sib_addr);
+ addr->sib_sid = rdma_get_service_id(ctx->cm_id, (struct sockaddr *)
+ &ctx->cm_id->route.addr.dst_addr);
+ }
+
+ if (copy_to_user(response, &resp, sizeof(resp)))
+ ret = -EFAULT;
+
+ return ret;
+}
+
static ssize_t ucma_query(struct ucma_file *file,
const char __user *inbuf,
int in_len, int out_len)
@@ -806,6 +853,9 @@ static ssize_t ucma_query(struct ucma_file *file,
case RDMA_USER_CM_QUERY_PATH:
ret = ucma_query_path(ctx, response, out_len);
break;
+ case RDMA_USER_CM_QUERY_GID:
+ ret = ucma_query_gid(ctx, response, out_len);
+ break;
default:
ret = -ENOSYS;
break;
diff --git a/include/uapi/rdma/rdma_user_cm.h b/include/uapi/rdma/rdma_user_cm.h
index 07eb6cf..ea79253 100644
--- a/include/uapi/rdma/rdma_user_cm.h
+++ b/include/uapi/rdma/rdma_user_cm.h
@@ -116,7 +116,8 @@ struct rdma_ucm_resolve_route {
enum {
RDMA_USER_CM_QUERY_ADDR,
- RDMA_USER_CM_QUERY_PATH
+ RDMA_USER_CM_QUERY_PATH,
+ RDMA_USER_CM_QUERY_GID
};
struct rdma_ucm_query {
--
1.7.3
--
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