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