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-rw-r--r--include/linux/rds.h8
-rw-r--r--net/rds/af_rds.c3
-rw-r--r--net/rds/rdma.c24
-rw-r--r--net/rds/rdma.h1
4 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/rds.h b/include/linux/rds.h
index 89d46e1afbb..cab4994c2f6 100644
--- a/include/linux/rds.h
+++ b/include/linux/rds.h
@@ -56,6 +56,7 @@
/* deprecated: RDS_BARRIER 4 */
#define RDS_RECVERR 5
#define RDS_CONG_MONITOR 6
+#define RDS_GET_MR_FOR_DEST 7
/*
* Control message types for SOL_RDS.
@@ -224,6 +225,13 @@ struct rds_get_mr_args {
uint64_t flags;
};
+struct rds_get_mr_for_dest_args {
+ struct sockaddr_storage dest_addr;
+ struct rds_iovec vec;
+ u_int64_t cookie_addr;
+ uint64_t flags;
+};
+
struct rds_free_mr_args {
rds_rdma_cookie_t cookie;
u_int64_t flags;
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index a202e5b3607..2b978dc6e75 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -265,6 +265,9 @@ static int rds_setsockopt(struct socket *sock, int level, int optname,
case RDS_GET_MR:
ret = rds_get_mr(rs, optval, optlen);
break;
+ case RDS_GET_MR_FOR_DEST:
+ ret = rds_get_mr_for_dest(rs, optval, optlen);
+ break;
case RDS_FREE_MR:
ret = rds_free_mr(rs, optval, optlen);
break;
diff --git a/net/rds/rdma.c b/net/rds/rdma.c
index 8dc83d2caa5..971b5a66845 100644
--- a/net/rds/rdma.c
+++ b/net/rds/rdma.c
@@ -317,6 +317,30 @@ int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen)
return __rds_rdma_map(rs, &args, NULL, NULL);
}
+int rds_get_mr_for_dest(struct rds_sock *rs, char __user *optval, int optlen)
+{
+ struct rds_get_mr_for_dest_args args;
+ struct rds_get_mr_args new_args;
+
+ if (optlen != sizeof(struct rds_get_mr_for_dest_args))
+ return -EINVAL;
+
+ if (copy_from_user(&args, (struct rds_get_mr_for_dest_args __user *)optval,
+ sizeof(struct rds_get_mr_for_dest_args)))
+ return -EFAULT;
+
+ /*
+ * Initially, just behave like get_mr().
+ * TODO: Implement get_mr as wrapper around this
+ * and deprecate it.
+ */
+ new_args.vec = args.vec;
+ new_args.cookie_addr = args.cookie_addr;
+ new_args.flags = args.flags;
+
+ return __rds_rdma_map(rs, &new_args, NULL, NULL);
+}
+
/*
* Free the MR indicated by the given R_Key
*/
diff --git a/net/rds/rdma.h b/net/rds/rdma.h
index 425512098b0..909c39835a5 100644
--- a/net/rds/rdma.h
+++ b/net/rds/rdma.h
@@ -61,6 +61,7 @@ static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie)
}
int rds_get_mr(struct rds_sock *rs, char __user *optval, int optlen);
+int rds_get_mr_for_dest(struct rds_sock *rs, char __user *optval, int optlen);
int rds_free_mr(struct rds_sock *rs, char __user *optval, int optlen);
void rds_rdma_drop_keys(struct rds_sock *rs);
int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,