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Commit 7ce86409 authored by Sean Hefty's avatar Sean Hefty Committed by Roland Dreier
Browse files

RDMA/ucma: Allow user space to set service type 



Export the ability to set the type of service to user space.  Model
the interface after setsockopt.

Signed-off-by: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent a81c994d

drivers/infiniband/core/ucma.c

+73 −1
Original line number Diff line number Diff line
@@ -792,6 +792,78 @@ out: 
	return ret;

}



static int ucma_set_option_id(struct ucma_context *ctx, int optname,

			      void *optval, size_t optlen)

{

	int ret = 0;



	switch (optname) {

	case RDMA_OPTION_ID_TOS:

		if (optlen != sizeof(u8)) {

			ret = -EINVAL;

			break;

		}

		rdma_set_service_type(ctx->cm_id, *((u8 *) optval));

		break;

	default:

		ret = -ENOSYS;

	}



	return ret;

}



static int ucma_set_option_level(struct ucma_context *ctx, int level,

				 int optname, void *optval, size_t optlen)

{

	int ret;



	switch (level) {

	case RDMA_OPTION_ID:

		ret = ucma_set_option_id(ctx, optname, optval, optlen);

		break;

	default:

		ret = -ENOSYS;

	}



	return ret;

}



static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,

			       int in_len, int out_len)

{

	struct rdma_ucm_set_option cmd;

	struct ucma_context *ctx;

	void *optval;

	int ret;



	if (copy_from_user(&cmd, inbuf, sizeof(cmd)))

		return -EFAULT;



	ctx = ucma_get_ctx(file, cmd.id);

	if (IS_ERR(ctx))

		return PTR_ERR(ctx);



	optval = kmalloc(cmd.optlen, GFP_KERNEL);

	if (!optval) {

		ret = -ENOMEM;

		goto out1;

	}



	if (copy_from_user(optval, (void __user *) (unsigned long) cmd.optval,

			   cmd.optlen)) {

		ret = -EFAULT;

		goto out2;

	}



	ret = ucma_set_option_level(ctx, cmd.level, cmd.optname, optval,

				    cmd.optlen);

out2:

	kfree(optval);

out1:

	ucma_put_ctx(ctx);

	return ret;

}



static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,

			   int in_len, int out_len)

{
@@ -936,7 +1008,7 @@ static ssize_t (*ucma_cmd_table[])(struct ucma_file *file, 
	[RDMA_USER_CM_CMD_INIT_QP_ATTR]	= ucma_init_qp_attr,

	[RDMA_USER_CM_CMD_GET_EVENT]	= ucma_get_event,

	[RDMA_USER_CM_CMD_GET_OPTION]	= NULL,

	[RDMA_USER_CM_CMD_SET_OPTION]	= NULL,

	[RDMA_USER_CM_CMD_SET_OPTION]	= ucma_set_option,

	[RDMA_USER_CM_CMD_NOTIFY]	= ucma_notify,

	[RDMA_USER_CM_CMD_JOIN_MCAST]	= ucma_join_multicast,

	[RDMA_USER_CM_CMD_LEAVE_MCAST]	= ucma_leave_multicast,

include/rdma/rdma_user_cm.h

+18 −0
Original line number Diff line number Diff line
@@ -212,4 +212,22 @@ struct rdma_ucm_event_resp { 
	} param;

};



/* Option levels */

enum {

	RDMA_OPTION_ID		= 0

};



/* Option details */

enum {

	RDMA_OPTION_ID_TOS	= 0

};



struct rdma_ucm_set_option {

	__u64 optval;

	__u32 id;

	__u32 level;

	__u32 optname;

	__u32 optlen;

};



#endif /* RDMA_USER_CM_H */