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Commit 3f446754 authored by Roland Dreier's avatar Roland Dreier
Browse files

RDMA/cma: Remove padding arrays by using struct sockaddr_storage 



There are a few places where the RDMA CM code handles IPv6 by doing

	struct sockaddr		addr;
	u8			pad[sizeof(struct sockaddr_in6) -
				    sizeof(struct sockaddr)];

This is fragile and ugly; handle this in a better way with just

	struct sockaddr_storage	addr;

[ Also roll in patch from Aleksey Senin <alekseys@voltaire.com> to
  switch to struct sockaddr_storage and get rid of padding arrays in
  struct rdma_addr. ]

Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 6e86841d

drivers/infiniband/core/cma.c

+18 −19
Original line number Diff line number Diff line
@@ -155,9 +155,7 @@ struct cma_multicast { 
	} multicast;

	struct list_head	list;

	void			*context;

	struct sockaddr		addr;

	u8			pad[sizeof(struct sockaddr_in6) -

				    sizeof(struct sockaddr)];

	struct sockaddr_storage	addr;

};



struct cma_work {
@@ -786,8 +784,8 @@ static void cma_cancel_operation(struct rdma_id_private *id_priv, 
		cma_cancel_route(id_priv);

		break;

	case CMA_LISTEN:

		if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&

		    !id_priv->cma_dev)

		if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)

				&& !id_priv->cma_dev)

			cma_cancel_listens(id_priv);

		break;

	default:
@@ -1026,7 +1024,7 @@ static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id, 
		rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;



	ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);

	ret = rdma_translate_ip(&id->route.addr.src_addr,

	ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,

				&id->route.addr.dev_addr);

	if (ret)

		goto destroy_id;
@@ -1064,7 +1062,7 @@ static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id, 
	cma_save_net_info(&id->route.addr, &listen_id->route.addr,

			  ip_ver, port, src, dst);



	ret = rdma_translate_ip(&id->route.addr.src_addr,

	ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,

				&id->route.addr.dev_addr);

	if (ret)

		goto err;
@@ -1377,7 +1375,7 @@ static int cma_ib_listen(struct rdma_id_private *id_priv) 
	if (IS_ERR(id_priv->cm_id.ib))

		return PTR_ERR(id_priv->cm_id.ib);



	addr = &id_priv->id.route.addr.src_addr;

	addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;

	svc_id = cma_get_service_id(id_priv->id.ps, addr);

	if (cma_any_addr(addr))

		ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
@@ -1443,7 +1441,7 @@ static void cma_listen_on_dev(struct rdma_id_private *id_priv, 


	dev_id_priv->state = CMA_ADDR_BOUND;

	memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,

	       ip_addr_size(&id_priv->id.route.addr.src_addr));

	       ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));



	cma_attach_to_dev(dev_id_priv, cma_dev);

	list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
@@ -1563,13 +1561,14 @@ static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms, 
	path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));

	path_rec.numb_path = 1;

	path_rec.reversible = 1;

	path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr);

	path_rec.service_id = cma_get_service_id(id_priv->id.ps,

							(struct sockaddr *) &addr->dst_addr);



	comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |

		    IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |

		    IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;



	if (addr->src_addr.sa_family == AF_INET) {

	if (addr->src_addr.ss_family == AF_INET) {

		path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);

		comp_mask |= IB_SA_PATH_REC_QOS_CLASS;

	} else {
@@ -1848,7 +1847,7 @@ static int cma_resolve_loopback(struct rdma_id_private *id_priv) 
	ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);

	ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);



	if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {

	if (cma_zero_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)) {

		src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;

		dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;

		src_in->sin_family = dst_in->sin_family;
@@ -1897,7 +1896,7 @@ int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr, 
	if (cma_any_addr(dst_addr))

		ret = cma_resolve_loopback(id_priv);

	else

		ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,

		ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,

				      dst_addr, &id->route.addr.dev_addr,

				      timeout_ms, addr_handler, id_priv);

	if (ret)
@@ -2021,11 +2020,11 @@ static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv) 
	 * We don't support binding to any address if anyone is bound to

	 * a specific address on the same port.

	 */

	if (cma_any_addr(&id_priv->id.route.addr.src_addr))

	if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))

		return -EADDRNOTAVAIL;



	hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {

		if (cma_any_addr(&cur_id->id.route.addr.src_addr))

		if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))

			return -EADDRNOTAVAIL;



		cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
@@ -2060,7 +2059,7 @@ static int cma_get_port(struct rdma_id_private *id_priv) 
	}



	mutex_lock(&lock);

	if (cma_any_port(&id_priv->id.route.addr.src_addr))

	if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))

		ret = cma_alloc_any_port(ps, id_priv);

	else

		ret = cma_use_port(ps, id_priv);
@@ -2232,7 +2231,7 @@ static int cma_resolve_ib_udp(struct rdma_id_private *id_priv, 


	req.path = route->path_rec;

	req.service_id = cma_get_service_id(id_priv->id.ps,

					    &route->addr.dst_addr);

					    (struct sockaddr *) &route->addr.dst_addr);

	req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);

	req.max_cm_retries = CMA_MAX_CM_RETRIES;
@@ -2283,7 +2282,7 @@ static int cma_connect_ib(struct rdma_id_private *id_priv, 
		req.alternate_path = &route->path_rec[1];



	req.service_id = cma_get_service_id(id_priv->id.ps,

					    &route->addr.dst_addr);

					    (struct sockaddr *) &route->addr.dst_addr);

	req.qp_num = id_priv->qp_num;

	req.qp_type = IB_QPT_RC;

	req.starting_psn = id_priv->seq_num;
@@ -2667,7 +2666,7 @@ static int cma_join_ib_multicast(struct rdma_id_private *id_priv, 
	if (ret)

		return ret;



	cma_set_mgid(id_priv, &mc->addr, &rec.mgid);

	cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);

	if (id_priv->id.ps == RDMA_PS_UDP)

		rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);

	ib_addr_get_sgid(dev_addr, &rec.port_gid);

drivers/infiniband/core/ucma.c

+6 −8
Original line number Diff line number Diff line
@@ -81,9 +81,7 @@ struct ucma_multicast { 


	u64			uid;

	struct list_head	list;

	struct sockaddr		addr;

	u8			pad[sizeof(struct sockaddr_in6) -

				    sizeof(struct sockaddr)];

	struct sockaddr_storage	addr;

};



struct ucma_event {
@@ -603,11 +601,11 @@ static ssize_t ucma_query_route(struct ucma_file *file, 
		return PTR_ERR(ctx);



	memset(&resp, 0, sizeof resp);

	addr = &ctx->cm_id->route.addr.src_addr;

	addr = (struct sockaddr *) &ctx->cm_id->route.addr.src_addr;

	memcpy(&resp.src_addr, addr, addr->sa_family == AF_INET ?

				     sizeof(struct sockaddr_in) :

				     sizeof(struct sockaddr_in6));

	addr = &ctx->cm_id->route.addr.dst_addr;

	addr = (struct sockaddr *) &ctx->cm_id->route.addr.dst_addr;

	memcpy(&resp.dst_addr, addr, addr->sa_family == AF_INET ?

				     sizeof(struct sockaddr_in) :

				     sizeof(struct sockaddr_in6));
@@ -913,7 +911,7 @@ static ssize_t ucma_join_multicast(struct ucma_file *file, 


	mc->uid = cmd.uid;

	memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr);

	ret = rdma_join_multicast(ctx->cm_id, &mc->addr, mc);

	ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc);

	if (ret)

		goto err2;
@@ -929,7 +927,7 @@ static ssize_t ucma_join_multicast(struct ucma_file *file, 
	return 0;



err3:

	rdma_leave_multicast(ctx->cm_id, &mc->addr);

	rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr);

	ucma_cleanup_mc_events(mc);

err2:

	mutex_lock(&mut);
@@ -975,7 +973,7 @@ static ssize_t ucma_leave_multicast(struct ucma_file *file, 
		goto out;

	}



	rdma_leave_multicast(mc->ctx->cm_id, &mc->addr);

	rdma_leave_multicast(mc->ctx->cm_id, (struct sockaddr *) &mc->addr);

	mutex_lock(&mc->ctx->file->mut);

	ucma_cleanup_mc_events(mc);

	list_del(&mc->list);

include/rdma/rdma_cm.h

+2 −6
Original line number Diff line number Diff line
@@ -71,12 +71,8 @@ enum rdma_port_space { 
};



struct rdma_addr {

	struct sockaddr src_addr;

	u8		src_pad[sizeof(struct sockaddr_in6) -

				sizeof(struct sockaddr)];

	struct sockaddr dst_addr;

	u8		dst_pad[sizeof(struct sockaddr_in6) -

				sizeof(struct sockaddr)];

	struct sockaddr_storage src_addr;

	struct sockaddr_storage dst_addr;

	struct rdma_dev_addr dev_addr;

};