IB: address translation to map IP toIB addresses (GIDs)
Add an address translation service that maps IP addresses to InfiniBand GID addresses using IPoIB. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty
Roland Dreier
parent
a1e8733e55
commit
7025fcd36b
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@ -29,6 +29,11 @@ config INFINIBAND_USER_ACCESS
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libibverbs, libibcm and a hardware driver library from
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<http://www.openib.org>.
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config INFINIBAND_ADDR_TRANS
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bool
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depends on INFINIBAND && INET
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default y
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source "drivers/infiniband/hw/mthca/Kconfig"
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source "drivers/infiniband/hw/ipath/Kconfig"
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@ -1,5 +1,7 @@
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addr_trans-$(CONFIG_INFINIBAND_ADDR_TRANS) := ib_addr.o
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obj-$(CONFIG_INFINIBAND) += ib_core.o ib_mad.o ib_sa.o \
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ib_cm.o
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ib_cm.o $(addr_trans-y)
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obj-$(CONFIG_INFINIBAND_USER_MAD) += ib_umad.o
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obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o
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@ -12,6 +14,8 @@ ib_sa-y := sa_query.o
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ib_cm-y := cm.o
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ib_addr-y := addr.o
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ib_umad-y := user_mad.o
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ib_ucm-y := ucm.o
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@ -0,0 +1,367 @@
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/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
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* Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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*
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* This Software is licensed under one of the following licenses:
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*
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* 1) under the terms of the "Common Public License 1.0" a copy of which is
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* available from the Open Source Initiative, see
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* http://www.opensource.org/licenses/cpl.php.
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*
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* 2) under the terms of the "The BSD License" a copy of which is
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* available from the Open Source Initiative, see
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* http://www.opensource.org/licenses/bsd-license.php.
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*
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* 3) under the terms of the "GNU General Public License (GPL) Version 2" a
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* copy of which is available from the Open Source Initiative, see
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* http://www.opensource.org/licenses/gpl-license.php.
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*
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* Licensee has the right to choose one of the above licenses.
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*
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* Redistributions of source code must retain the above copyright
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* notice and one of the license notices.
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*
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* Redistributions in binary form must reproduce both the above copyright
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* notice, one of the license notices in the documentation
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* and/or other materials provided with the distribution.
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*/
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#include <linux/mutex.h>
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#include <linux/inetdevice.h>
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#include <linux/workqueue.h>
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#include <linux/if_arp.h>
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#include <net/arp.h>
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#include <net/neighbour.h>
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#include <net/route.h>
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#include <rdma/ib_addr.h>
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MODULE_AUTHOR("Sean Hefty");
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MODULE_DESCRIPTION("IB Address Translation");
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MODULE_LICENSE("Dual BSD/GPL");
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struct addr_req {
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struct list_head list;
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struct sockaddr src_addr;
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struct sockaddr dst_addr;
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struct rdma_dev_addr *addr;
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void *context;
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void (*callback)(int status, struct sockaddr *src_addr,
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struct rdma_dev_addr *addr, void *context);
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unsigned long timeout;
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int status;
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};
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static void process_req(void *data);
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static DEFINE_MUTEX(lock);
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static LIST_HEAD(req_list);
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static DECLARE_WORK(work, process_req, NULL);
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static struct workqueue_struct *addr_wq;
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static int copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
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unsigned char *dst_dev_addr)
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{
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switch (dev->type) {
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case ARPHRD_INFINIBAND:
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dev_addr->dev_type = IB_NODE_CA;
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break;
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default:
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return -EADDRNOTAVAIL;
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}
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memcpy(dev_addr->src_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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memcpy(dev_addr->broadcast, dev->broadcast, MAX_ADDR_LEN);
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if (dst_dev_addr)
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memcpy(dev_addr->dst_dev_addr, dst_dev_addr, MAX_ADDR_LEN);
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return 0;
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}
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int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
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{
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struct net_device *dev;
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u32 ip = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
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int ret;
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dev = ip_dev_find(ip);
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if (!dev)
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return -EADDRNOTAVAIL;
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ret = copy_addr(dev_addr, dev, NULL);
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dev_put(dev);
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return ret;
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}
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EXPORT_SYMBOL(rdma_translate_ip);
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static void set_timeout(unsigned long time)
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{
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unsigned long delay;
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cancel_delayed_work(&work);
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delay = time - jiffies;
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if ((long)delay <= 0)
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delay = 1;
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queue_delayed_work(addr_wq, &work, delay);
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}
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static void queue_req(struct addr_req *req)
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{
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struct addr_req *temp_req;
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mutex_lock(&lock);
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list_for_each_entry_reverse(temp_req, &req_list, list) {
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if (time_after(req->timeout, temp_req->timeout))
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break;
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}
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list_add(&req->list, &temp_req->list);
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if (req_list.next == &req->list)
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set_timeout(req->timeout);
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mutex_unlock(&lock);
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}
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static void addr_send_arp(struct sockaddr_in *dst_in)
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{
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struct rtable *rt;
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struct flowi fl;
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u32 dst_ip = dst_in->sin_addr.s_addr;
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memset(&fl, 0, sizeof fl);
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fl.nl_u.ip4_u.daddr = dst_ip;
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if (ip_route_output_key(&rt, &fl))
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return;
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arp_send(ARPOP_REQUEST, ETH_P_ARP, rt->rt_gateway, rt->idev->dev,
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rt->rt_src, NULL, rt->idev->dev->dev_addr, NULL);
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ip_rt_put(rt);
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}
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static int addr_resolve_remote(struct sockaddr_in *src_in,
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struct sockaddr_in *dst_in,
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struct rdma_dev_addr *addr)
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{
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u32 src_ip = src_in->sin_addr.s_addr;
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u32 dst_ip = dst_in->sin_addr.s_addr;
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struct flowi fl;
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struct rtable *rt;
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struct neighbour *neigh;
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int ret;
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memset(&fl, 0, sizeof fl);
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fl.nl_u.ip4_u.daddr = dst_ip;
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fl.nl_u.ip4_u.saddr = src_ip;
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ret = ip_route_output_key(&rt, &fl);
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if (ret)
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goto out;
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/* If the device does ARP internally, return 'done' */
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if (rt->idev->dev->flags & IFF_NOARP) {
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copy_addr(addr, rt->idev->dev, NULL);
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goto put;
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}
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neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, rt->idev->dev);
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if (!neigh) {
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ret = -ENODATA;
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goto put;
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}
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if (!(neigh->nud_state & NUD_VALID)) {
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ret = -ENODATA;
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goto release;
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}
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if (!src_ip) {
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src_in->sin_family = dst_in->sin_family;
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src_in->sin_addr.s_addr = rt->rt_src;
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}
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ret = copy_addr(addr, neigh->dev, neigh->ha);
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release:
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neigh_release(neigh);
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put:
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ip_rt_put(rt);
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out:
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return ret;
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}
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static void process_req(void *data)
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{
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struct addr_req *req, *temp_req;
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struct sockaddr_in *src_in, *dst_in;
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struct list_head done_list;
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INIT_LIST_HEAD(&done_list);
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mutex_lock(&lock);
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list_for_each_entry_safe(req, temp_req, &req_list, list) {
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if (req->status) {
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src_in = (struct sockaddr_in *) &req->src_addr;
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dst_in = (struct sockaddr_in *) &req->dst_addr;
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req->status = addr_resolve_remote(src_in, dst_in,
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req->addr);
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}
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if (req->status && time_after(jiffies, req->timeout))
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req->status = -ETIMEDOUT;
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else if (req->status == -ENODATA)
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continue;
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list_del(&req->list);
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list_add_tail(&req->list, &done_list);
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}
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if (!list_empty(&req_list)) {
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req = list_entry(req_list.next, struct addr_req, list);
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set_timeout(req->timeout);
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}
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mutex_unlock(&lock);
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list_for_each_entry_safe(req, temp_req, &done_list, list) {
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list_del(&req->list);
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req->callback(req->status, &req->src_addr, req->addr,
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req->context);
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kfree(req);
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}
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}
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static int addr_resolve_local(struct sockaddr_in *src_in,
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struct sockaddr_in *dst_in,
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struct rdma_dev_addr *addr)
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{
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struct net_device *dev;
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u32 src_ip = src_in->sin_addr.s_addr;
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u32 dst_ip = dst_in->sin_addr.s_addr;
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int ret;
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dev = ip_dev_find(dst_ip);
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if (!dev)
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return -EADDRNOTAVAIL;
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if (ZERONET(src_ip)) {
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src_in->sin_family = dst_in->sin_family;
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src_in->sin_addr.s_addr = dst_ip;
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ret = copy_addr(addr, dev, dev->dev_addr);
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} else if (LOOPBACK(src_ip)) {
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ret = rdma_translate_ip((struct sockaddr *)dst_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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} else {
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ret = rdma_translate_ip((struct sockaddr *)src_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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}
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dev_put(dev);
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return ret;
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}
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int rdma_resolve_ip(struct sockaddr *src_addr, struct sockaddr *dst_addr,
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struct rdma_dev_addr *addr, int timeout_ms,
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void (*callback)(int status, struct sockaddr *src_addr,
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struct rdma_dev_addr *addr, void *context),
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void *context)
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{
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struct sockaddr_in *src_in, *dst_in;
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struct addr_req *req;
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int ret = 0;
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req = kmalloc(sizeof *req, GFP_KERNEL);
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if (!req)
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return -ENOMEM;
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memset(req, 0, sizeof *req);
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if (src_addr)
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memcpy(&req->src_addr, src_addr, ip_addr_size(src_addr));
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memcpy(&req->dst_addr, dst_addr, ip_addr_size(dst_addr));
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req->addr = addr;
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req->callback = callback;
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req->context = context;
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src_in = (struct sockaddr_in *) &req->src_addr;
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dst_in = (struct sockaddr_in *) &req->dst_addr;
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req->status = addr_resolve_local(src_in, dst_in, addr);
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if (req->status == -EADDRNOTAVAIL)
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req->status = addr_resolve_remote(src_in, dst_in, addr);
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switch (req->status) {
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case 0:
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req->timeout = jiffies;
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queue_req(req);
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break;
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case -ENODATA:
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req->timeout = msecs_to_jiffies(timeout_ms) + jiffies;
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queue_req(req);
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addr_send_arp(dst_in);
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break;
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default:
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ret = req->status;
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kfree(req);
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL(rdma_resolve_ip);
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void rdma_addr_cancel(struct rdma_dev_addr *addr)
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{
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struct addr_req *req, *temp_req;
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mutex_lock(&lock);
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list_for_each_entry_safe(req, temp_req, &req_list, list) {
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if (req->addr == addr) {
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req->status = -ECANCELED;
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req->timeout = jiffies;
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list_del(&req->list);
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list_add(&req->list, &req_list);
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set_timeout(req->timeout);
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break;
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}
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}
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mutex_unlock(&lock);
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}
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EXPORT_SYMBOL(rdma_addr_cancel);
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static int addr_arp_recv(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *pkt, struct net_device *orig_dev)
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{
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struct arphdr *arp_hdr;
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arp_hdr = (struct arphdr *) skb->nh.raw;
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if (arp_hdr->ar_op == htons(ARPOP_REQUEST) ||
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arp_hdr->ar_op == htons(ARPOP_REPLY))
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set_timeout(jiffies);
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kfree_skb(skb);
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return 0;
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}
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static struct packet_type addr_arp = {
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.type = __constant_htons(ETH_P_ARP),
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.func = addr_arp_recv,
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.af_packet_priv = (void*) 1,
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};
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static int addr_init(void)
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{
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addr_wq = create_singlethread_workqueue("ib_addr_wq");
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if (!addr_wq)
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return -ENOMEM;
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dev_add_pack(&addr_arp);
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return 0;
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}
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static void addr_cleanup(void)
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{
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dev_remove_pack(&addr_arp);
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destroy_workqueue(addr_wq);
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}
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module_init(addr_init);
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module_exit(addr_cleanup);
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@ -0,0 +1,114 @@
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/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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*
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* This Software is licensed under one of the following licenses:
|
||||
*
|
||||
* 1) under the terms of the "Common Public License 1.0" a copy of which is
|
||||
* available from the Open Source Initiative, see
|
||||
* http://www.opensource.org/licenses/cpl.php.
|
||||
*
|
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* 2) under the terms of the "The BSD License" a copy of which is
|
||||
* available from the Open Source Initiative, see
|
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* http://www.opensource.org/licenses/bsd-license.php.
|
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*
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* 3) under the terms of the "GNU General Public License (GPL) Version 2" a
|
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* copy of which is available from the Open Source Initiative, see
|
||||
* http://www.opensource.org/licenses/gpl-license.php.
|
||||
*
|
||||
* Licensee has the right to choose one of the above licenses.
|
||||
*
|
||||
* Redistributions of source code must retain the above copyright
|
||||
* notice and one of the license notices.
|
||||
*
|
||||
* Redistributions in binary form must reproduce both the above copyright
|
||||
* notice, one of the license notices in the documentation
|
||||
* and/or other materials provided with the distribution.
|
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*
|
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*/
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#if !defined(IB_ADDR_H)
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#define IB_ADDR_H
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/netdevice.h>
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#include <linux/socket.h>
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#include <rdma/ib_verbs.h>
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struct rdma_dev_addr {
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unsigned char src_dev_addr[MAX_ADDR_LEN];
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unsigned char dst_dev_addr[MAX_ADDR_LEN];
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unsigned char broadcast[MAX_ADDR_LEN];
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enum ib_node_type dev_type;
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};
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/**
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* rdma_translate_ip - Translate a local IP address to an RDMA hardware
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* address.
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*/
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int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
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/**
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* rdma_resolve_ip - Resolve source and destination IP addresses to
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* RDMA hardware addresses.
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* @src_addr: An optional source address to use in the resolution. If a
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* source address is not provided, a usable address will be returned via
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* the callback.
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* @dst_addr: The destination address to resolve.
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* @addr: A reference to a data location that will receive the resolved
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* addresses. The data location must remain valid until the callback has
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* been invoked.
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* @timeout_ms: Amount of time to wait for the address resolution to complete.
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* @callback: Call invoked once address resolution has completed, timed out,
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* or been canceled. A status of 0 indicates success.
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* @context: User-specified context associated with the call.
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*/
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int rdma_resolve_ip(struct sockaddr *src_addr, struct sockaddr *dst_addr,
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struct rdma_dev_addr *addr, int timeout_ms,
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void (*callback)(int status, struct sockaddr *src_addr,
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struct rdma_dev_addr *addr, void *context),
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void *context);
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|
||||
void rdma_addr_cancel(struct rdma_dev_addr *addr);
|
||||
|
||||
static inline int ip_addr_size(struct sockaddr *addr)
|
||||
{
|
||||
return addr->sa_family == AF_INET6 ?
|
||||
sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
|
||||
}
|
||||
|
||||
static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
|
||||
{
|
||||
return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
|
||||
}
|
||||
|
||||
static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
|
||||
{
|
||||
dev_addr->broadcast[8] = pkey >> 8;
|
||||
dev_addr->broadcast[9] = (unsigned char) pkey;
|
||||
}
|
||||
|
||||
static inline union ib_gid *ib_addr_get_sgid(struct rdma_dev_addr *dev_addr)
|
||||
{
|
||||
return (union ib_gid *) (dev_addr->src_dev_addr + 4);
|
||||
}
|
||||
|
||||
static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
|
||||
union ib_gid *gid)
|
||||
{
|
||||
memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
|
||||
}
|
||||
|
||||
static inline union ib_gid *ib_addr_get_dgid(struct rdma_dev_addr *dev_addr)
|
||||
{
|
||||
return (union ib_gid *) (dev_addr->dst_dev_addr + 4);
|
||||
}
|
||||
|
||||
static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
|
||||
union ib_gid *gid)
|
||||
{
|
||||
memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
|
||||
}
|
||||
|
||||
#endif /* IB_ADDR_H */
|
||||
Loading…
Reference in New Issue